Speedometer Gear Reducer Adapter
- Thread starter 78gmcroyale
- Start date
Jim K. sells a gear reduction box of the appropriate ratio that matches the
final drive sets that he sells. With the 3:70 -1 gears that I installed in
my 78 Royale with a 403 engine and original tire circumference, it is dead
spot on the mark. Another option is a GPS speedometer, you just calibrate
it as you travel down the road. Both systems work well.
Jim Hupy
Salem, Oregon
On Mon, Nov 2, 2020, 7:30 AM 78gmcroyale via Gmclist <
>
> Good Morning If I recall someone on here is knowledgeable of speedometer
> gear adapters. Can anyone connect me with that person?ThanksRaySent from
> my U.S.Cellular© Smartphone
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
final drive sets that he sells. With the 3:70 -1 gears that I installed in
my 78 Royale with a 403 engine and original tire circumference, it is dead
spot on the mark. Another option is a GPS speedometer, you just calibrate
it as you travel down the road. Both systems work well.
Jim Hupy
Salem, Oregon
On Mon, Nov 2, 2020, 7:30 AM 78gmcroyale via Gmclist <
>
> Good Morning If I recall someone on here is knowledgeable of speedometer
> gear adapters. Can anyone connect me with that person?ThanksRaySent from
> my U.S.Cellular© Smartphone
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
I have the 3.7 with the supplied gear adapter but I run 245 tires so my =
speedo reads fast.=C2=A0 I need a .879 reducer or a couple of different gea=
rs.Sent from my U.S.Cellular=C2=A9 Smartphone -------- Original message =
--------From: James Hupy via Gmclist Date: 11/2/2=
0 9:39 AM (GMT-06:00) To: gmclist Cc: James Hupy Subject: Re: [GMCnet] Speedometer Gear Reducer Adapter Jim K=
. sells a gear reduction box of the appropriate ratio that matches thefinal=
drive sets that he sells. With the 3:70 -1 gears that I installed inmy 78 =
Royale with a 403 engine and original tire circumference, it is deadspot on=
the mark. Another option is a GPS speedometer, you just calibrateit as you=
travel down the road. Both systems work well.Jim HupySalem, OregonOn Mon, =
Nov 2, 2020, 7:30 AM 78gmcroyale via Gmclist wrot=
e:>> Good Morning If I recall someone on here is knowledgeable of speedomet=
er> gear adapters.=C2=A0 Can anyone connect me with that person?ThanksRaySe=
nt from> my=C2=A0 U.S.Cellular=C2=A9 Smartphone> __________________________=
_____________________> GMCnet mailing list> Unsubscribe or Change List Opti=
ons:> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org>_____=
__________________________________________GMCnet mailing listUnsubscribe or=
Change List Options:http://list.gmcnet.org/mailman/listinfo/gmclist_list.g=
mcnet.org
speedo reads fast.=C2=A0 I need a .879 reducer or a couple of different gea=
rs.Sent from my U.S.Cellular=C2=A9 Smartphone -------- Original message =
--------From: James Hupy via Gmclist Date: 11/2/2=
0 9:39 AM (GMT-06:00) To: gmclist Cc: James Hupy Subject: Re: [GMCnet] Speedometer Gear Reducer Adapter Jim K=
. sells a gear reduction box of the appropriate ratio that matches thefinal=
drive sets that he sells. With the 3:70 -1 gears that I installed inmy 78 =
Royale with a 403 engine and original tire circumference, it is deadspot on=
the mark. Another option is a GPS speedometer, you just calibrateit as you=
travel down the road. Both systems work well.Jim HupySalem, OregonOn Mon, =
Nov 2, 2020, 7:30 AM 78gmcroyale via Gmclist wrot=
e:>> Good Morning If I recall someone on here is knowledgeable of speedomet=
er> gear adapters.=C2=A0 Can anyone connect me with that person?ThanksRaySe=
nt from> my=C2=A0 U.S.Cellular=C2=A9 Smartphone> __________________________=
_____________________> GMCnet mailing list> Unsubscribe or Change List Opti=
ons:> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org>_____=
__________________________________________GMCnet mailing listUnsubscribe or=
Change List Options:http://list.gmcnet.org/mailman/listinfo/gmclist_list.g=
mcnet.org
Why don't you just call Jim Kanomata as I know how to do it.
You all need to learn that a phone call to me will always be returned .
On Mon, Nov 2, 2020 at 7:52 AM 78gmcroyale via Gmclist <
>
> I have the 3.7 with the supplied gear adapter but I run 245 tires so my
> speedo reads fast. I need a .879 reducer or a couple of different
> gears.Sent from my U.S.Cellular© Smartphone
> -------- Original message --------From: James Hupy via Gmclist <
> gmclist> Date: 11/2/20 9:39 AM (GMT-06:00) To:
> gmclist Cc: James Hupy Subject:
> Re: [GMCnet] Speedometer Gear Reducer Adapter Jim K. sells a gear reduction
> box of the appropriate ratio that matches thefinal drive sets that he
> sells. With the 3:70 -1 gears that I installed inmy 78 Royale with a 403
> engine and original tire circumference, it is deadspot on the mark. Another
> option is a GPS speedometer, you just calibrateit as you travel down the
> road. Both systems work well.Jim HupySalem, OregonOn Mon, Nov 2, 2020, 7:30
> AM 78gmcroyale via Gmclist wrote:>> Good
> Morning If I recall someone on here is knowledgeable of speedometer> gear
> adapters. Can anyone connect me with that person?ThanksRaySent from> my
> U.S.Cellular© Smartphone> _______________________________________________>
> GMCnet mailing list> Unsubscribe or Change List Options:>
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org>_______________________________________________GMCnet
> mailing listUnsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
--
Jim Kanomata
Applied/GMC, Newark,CA
jimk
http://www.gmcrvparts.com
1-800-752-7502
You all need to learn that a phone call to me will always be returned .
On Mon, Nov 2, 2020 at 7:52 AM 78gmcroyale via Gmclist <
>
> I have the 3.7 with the supplied gear adapter but I run 245 tires so my
> speedo reads fast. I need a .879 reducer or a couple of different
> gears.Sent from my U.S.Cellular© Smartphone
> -------- Original message --------From: James Hupy via Gmclist <
> gmclist> Date: 11/2/20 9:39 AM (GMT-06:00) To:
> gmclist Cc: James Hupy Subject:
> Re: [GMCnet] Speedometer Gear Reducer Adapter Jim K. sells a gear reduction
> box of the appropriate ratio that matches thefinal drive sets that he
> sells. With the 3:70 -1 gears that I installed inmy 78 Royale with a 403
> engine and original tire circumference, it is deadspot on the mark. Another
> option is a GPS speedometer, you just calibrateit as you travel down the
> road. Both systems work well.Jim HupySalem, OregonOn Mon, Nov 2, 2020, 7:30
> AM 78gmcroyale via Gmclist wrote:>> Good
> Morning If I recall someone on here is knowledgeable of speedometer> gear
> adapters. Can anyone connect me with that person?ThanksRaySent from> my
> U.S.Cellular© Smartphone> _______________________________________________>
> GMCnet mailing list> Unsubscribe or Change List Options:>
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org>_______________________________________________GMCnet
> mailing listUnsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
--
Jim Kanomata
Applied/GMC, Newark,CA
jimk
http://www.gmcrvparts.com
1-800-752-7502
It may be an option to change the driven gear, on the transmission, to one with more teeth so that it will slow the turn rate of the cable.
They are about $10.
--
Todd Snyder, Buffalo NY
1976 Eleganza II
They are about $10.
--
Todd Snyder, Buffalo NY
1976 Eleganza II
There are at least 3 speedometer gears available from your GMC dealer for the 425 trans. There is a yellow, white and I think a light blue available. One is stock, one is a lower gear and one is a higher gear. I look for the information this morning and came up short. Call Jim K and he may be able to help you or call Manny.
J.R. Wright
GMC Great Laker MHC
GMCGL Tech Editor
GMC Eastern States Charter Member
GMCMI
78 GMC Buskirk 29.5’ Stretch
75 GMC Avion (Under Reconstruction)
Michigan
>
> It may be an option to change the driven gear, on the transmission, to one with more teeth so that it will slow the turn rate of the cable.
>
> They are about $10.
> --
> Todd Snyder, Buffalo NY
> 1976 Eleganza II
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
J.R. Wright
GMC Great Laker MHC
GMCGL Tech Editor
GMC Eastern States Charter Member
GMCMI
78 GMC Buskirk 29.5’ Stretch
75 GMC Avion (Under Reconstruction)
Michigan
>
> It may be an option to change the driven gear, on the transmission, to one with more teeth so that it will slow the turn rate of the cable.
>
> They are about $10.
> --
> Todd Snyder, Buffalo NY
> 1976 Eleganza II
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
Summitt has these gears:
https://www.summitracing.com/parts/tci-880031
880029 41 tooth
880030 42 tooth
880031 43 tooth
880032 45 tooth
880013 44 tooth
On Tue, Nov 3, 2020 at 7:49 AM John Wright via Gmclist <
> There are at least 3 speedometer gears available from your GMC dealer for
> the 425 trans. There is a yellow, white and I think a light blue
> available. One is stock, one is a lower gear and one is a higher gear. I
> look for the information this morning and came up short. Call Jim K and he
> may be able to help you or call Manny.
>
> J.R. Wright
> GMC Great Laker MHC
> GMCGL Tech Editor
> GMC Eastern States Charter Member
> GMCMI
> 78 GMC Buskirk 29.5’ Stretch
> 75 GMC Avion (Under Reconstruction)
> Michigan
>
>
> > On Nov 3, 2020, at 8:24 AM, Todd Snyder via Gmclist <
> >
> > It may be an option to change the driven gear, on the transmission, to
> one with more teeth so that it will slow the turn rate of the cable.
> >
> > They are about $10.
> > --
> > Todd Snyder, Buffalo NY
> > 1976 Eleganza II
> >
> > _______________________________________________
> > GMCnet mailing list
> > Unsubscribe or Change List Options:
> > http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
--
Bruce Hart
1976 Palm Beach
Milliken, Co
GMC=Got More Class
https://www.summitracing.com/parts/tci-880031
880029 41 tooth
880030 42 tooth
880031 43 tooth
880032 45 tooth
880013 44 tooth
On Tue, Nov 3, 2020 at 7:49 AM John Wright via Gmclist <
> There are at least 3 speedometer gears available from your GMC dealer for
> the 425 trans. There is a yellow, white and I think a light blue
> available. One is stock, one is a lower gear and one is a higher gear. I
> look for the information this morning and came up short. Call Jim K and he
> may be able to help you or call Manny.
>
> J.R. Wright
> GMC Great Laker MHC
> GMCGL Tech Editor
> GMC Eastern States Charter Member
> GMCMI
> 78 GMC Buskirk 29.5’ Stretch
> 75 GMC Avion (Under Reconstruction)
> Michigan
>
>
> > On Nov 3, 2020, at 8:24 AM, Todd Snyder via Gmclist <
> >
> > It may be an option to change the driven gear, on the transmission, to
> one with more teeth so that it will slow the turn rate of the cable.
> >
> > They are about $10.
> > --
> > Todd Snyder, Buffalo NY
> > 1976 Eleganza II
> >
> > _______________________________________________
> > GMCnet mailing list
> > Unsubscribe or Change List Options:
> > http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
--
Bruce Hart
1976 Palm Beach
Milliken, Co
GMC=Got More Class
Bruce,
Yes, the gears are available, but those teeth counts way off what we need
to correct.
I can get the odometer to read within 2-4% by ordering in the right gear
combination in the reducer.
I help lot of people with them.
On Tue, Nov 3, 2020 at 7:31 AM Bruce Hart via Gmclist <
> Summitt has these gears:
>
> https://www.summitracing.com/parts/tci-880031
> 880029 41 tooth
> 880030 42 tooth
> 880031 43 tooth
> 880032 45 tooth
> 880013 44 tooth
>
>
>
> On Tue, Nov 3, 2020 at 7:49 AM John Wright via Gmclist <
>
> > There are at least 3 speedometer gears available from your GMC dealer for
> > the 425 trans. There is a yellow, white and I think a light blue
> > available. One is stock, one is a lower gear and one is a higher gear. I
> > look for the information this morning and came up short. Call Jim K and
> he
> > may be able to help you or call Manny.
> >
> > J.R. Wright
> > GMC Great Laker MHC
> > GMCGL Tech Editor
> > GMC Eastern States Charter Member
> > GMCMI
> > 78 GMC Buskirk 29.5’ Stretch
> > 75 GMC Avion (Under Reconstruction)
> > Michigan
> >
> >
> > > On Nov 3, 2020, at 8:24 AM, Todd Snyder via Gmclist <
> > >
> > > It may be an option to change the driven gear, on the transmission, to
> > one with more teeth so that it will slow the turn rate of the cable.
> > >
> > > They are about $10.
> > > --
> > > Todd Snyder, Buffalo NY
> > > 1976 Eleganza II
> > >
> > > _______________________________________________
> > > GMCnet mailing list
> > > Unsubscribe or Change List Options:
> > > http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
> >
> >
> > _______________________________________________
> > GMCnet mailing list
> > Unsubscribe or Change List Options:
> > http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
> >
>
>
> --
> Bruce Hart
> 1976 Palm Beach
> Milliken, Co
> GMC=Got More Class
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
--
Jim Kanomata
Applied/GMC, Newark,CA
jimk
http://www.gmcrvparts.com
1-800-752-7502
Yes, the gears are available, but those teeth counts way off what we need
to correct.
I can get the odometer to read within 2-4% by ordering in the right gear
combination in the reducer.
I help lot of people with them.
On Tue, Nov 3, 2020 at 7:31 AM Bruce Hart via Gmclist <
> Summitt has these gears:
>
> https://www.summitracing.com/parts/tci-880031
> 880029 41 tooth
> 880030 42 tooth
> 880031 43 tooth
> 880032 45 tooth
> 880013 44 tooth
>
>
>
> On Tue, Nov 3, 2020 at 7:49 AM John Wright via Gmclist <
>
> > There are at least 3 speedometer gears available from your GMC dealer for
> > the 425 trans. There is a yellow, white and I think a light blue
> > available. One is stock, one is a lower gear and one is a higher gear. I
> > look for the information this morning and came up short. Call Jim K and
> he
> > may be able to help you or call Manny.
> >
> > J.R. Wright
> > GMC Great Laker MHC
> > GMCGL Tech Editor
> > GMC Eastern States Charter Member
> > GMCMI
> > 78 GMC Buskirk 29.5’ Stretch
> > 75 GMC Avion (Under Reconstruction)
> > Michigan
> >
> >
> > > On Nov 3, 2020, at 8:24 AM, Todd Snyder via Gmclist <
> > >
> > > It may be an option to change the driven gear, on the transmission, to
> > one with more teeth so that it will slow the turn rate of the cable.
> > >
> > > They are about $10.
> > > --
> > > Todd Snyder, Buffalo NY
> > > 1976 Eleganza II
> > >
> > > _______________________________________________
> > > GMCnet mailing list
> > > Unsubscribe or Change List Options:
> > > http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
> >
> >
> > _______________________________________________
> > GMCnet mailing list
> > Unsubscribe or Change List Options:
> > http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
> >
>
>
> --
> Bruce Hart
> 1976 Palm Beach
> Milliken, Co
> GMC=Got More Class
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
--
Jim Kanomata
Applied/GMC, Newark,CA
jimk
http://www.gmcrvparts.com
1-800-752-7502
How many teeth does the stock gear have?Sent from my U.S.Cellular=C2=
=A9 Smartphone -------- Original message --------From: Bruce Hart via Gmc=
list Date: 11/3/20 9:31 AM (GMT-06:00) To: gmcl=
ist Cc: Bruce Hart Subject: Re: [GMCne=
t] Speedometer Gear Reducer Adapter Summitt has these gears: https://www.su=
mmitracing.com/parts/tci-880031880029=C2=A0 41 tooth880030=C2=A0 42 tooth88=
0031=C2=A0 43 tooth880032=C2=A0 45 tooth880013=C2=A0 44 toothOn Tue, Nov 3,=
2020 at 7:49 AM John Wright via Gmclist wrote:> =
There are at least 3 speedometer gears available from your GMC dealer for> =
the 425 trans.=C2=A0 There is a yellow, white and I think a light blue> ava=
ilable. One is stock, one is a lower gear and one is a higher gear.=C2=
=A0 I> look for the information this morning and came up short.=C2=A0 Call =
Jim K and he> may be able to help you or call Manny.>> J.R. Wright> GMC Gre=
at Laker MHC> GMCGL Tech Editor> GMC Eastern States Charter Member> GMCMI> =
78 GMC Buskirk 29.5=E2=80=99 Stretch> 75 GMC Avion (Under Reconstruction)> =
Michigan>>> > On Nov 3, 2020, at 8:24 AM, Todd Snyder via Gmclist gmclis=
t> wrote:> >> > It may be an option to change the driven ge=
ar, on the transmission, to> one with more teeth so that it will slow the t=
urn rate of the cable.> >> > They are about $10.> > --> > Todd Snyder, Buff=
alo NY> > 1976 Eleganza II> >> > __________________________________________=
_____> > GMCnet mailing list> > Unsubscribe or Change List Options:> > http=
://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org>>> ____________=
___________________________________> GMCnet mailing list> Unsubscribe or Ch=
ange List Options:> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gm=
cnet.org>-- Bruce Hart1976 Palm BeachMilliken, CoGMC Got More Class______=
_________________________________________GMCnet mailing listUnsubscribe or =
Change List Options:http://list.gmcnet.org/mailman/listinfo/gmclist_list.gm=
cnet.org
=A9 Smartphone -------- Original message --------From: Bruce Hart via Gmc=
list Date: 11/3/20 9:31 AM (GMT-06:00) To: gmcl=
ist Cc: Bruce Hart Subject: Re: [GMCne=
t] Speedometer Gear Reducer Adapter Summitt has these gears: https://www.su=
mmitracing.com/parts/tci-880031880029=C2=A0 41 tooth880030=C2=A0 42 tooth88=
0031=C2=A0 43 tooth880032=C2=A0 45 tooth880013=C2=A0 44 toothOn Tue, Nov 3,=
2020 at 7:49 AM John Wright via Gmclist wrote:> =
There are at least 3 speedometer gears available from your GMC dealer for> =
the 425 trans.=C2=A0 There is a yellow, white and I think a light blue> ava=
ilable. One is stock, one is a lower gear and one is a higher gear.=C2=
=A0 I> look for the information this morning and came up short.=C2=A0 Call =
Jim K and he> may be able to help you or call Manny.>> J.R. Wright> GMC Gre=
at Laker MHC> GMCGL Tech Editor> GMC Eastern States Charter Member> GMCMI> =
78 GMC Buskirk 29.5=E2=80=99 Stretch> 75 GMC Avion (Under Reconstruction)> =
Michigan>>> > On Nov 3, 2020, at 8:24 AM, Todd Snyder via Gmclist gmclis=
t> wrote:> >> > It may be an option to change the driven ge=
ar, on the transmission, to> one with more teeth so that it will slow the t=
urn rate of the cable.> >> > They are about $10.> > --> > Todd Snyder, Buff=
alo NY> > 1976 Eleganza II> >> > __________________________________________=
_____> > GMCnet mailing list> > Unsubscribe or Change List Options:> > http=
://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org>>> ____________=
___________________________________> GMCnet mailing list> Unsubscribe or Ch=
ange List Options:> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gm=
cnet.org>-- Bruce Hart1976 Palm BeachMilliken, CoGMC Got More Class______=
_________________________________________GMCnet mailing listUnsubscribe or =
Change List Options:http://list.gmcnet.org/mailman/listinfo/gmclist_list.gm=
cnet.org
Right now I'm running a .944 gear reducer and my speedo reads 4.2% fast.=
=C2=A0 If I'm correct I think I need a .879 reducer.Sent from my U.S.Cellu=
lar=C2=A9 Smartphone -------- Original message --------From: Jim Kanomata=
via Gmclist Date: 11/3/20 10:42 AM (GMT-06:00)=
To: gmclist Cc: Jim Kanomata Subje=
ct: Re: [GMCnet] Speedometer Gear Reducer Adapter Bruce,Yes, the gears are =
available, but those teeth counts way off what we needto correct.I can get =
the odometer to read within 2-4% by ordering in the right gearcombination i=
n the reducer.I help lot of people with them.On Tue, Nov 3, 2020 at 7:31 AM=
Bruce Hart via Gmclist wrote:> Summitt has these=
gears:>>=C2=A0 https://www.summitracing.com/parts/tci-880031> 880029=C2=
=A0 41 tooth> 880030=C2=A0 42 tooth> 880031=C2=A0 43 tooth> 880032=C2=A0 45=
tooth> 880013=C2=A0 44 tooth>>>> On Tue, Nov 3, 2020 at 7:49 AM John Wrigh=
t via Gmclist gmclist> wrote:>> > There are at least 3 s=
peedometer gears available from your GMC dealer for> > the 425 trans.=C2=
=A0 There is a yellow, white and I think a light blue> > available. One is =
stock, one is a lower gear and one is a higher gear.=C2=A0 I> > look for th=
e information this morning and came up short.=C2=A0 Call Jim K and> he> > m=
ay be able to help you or call Manny.> >> > J.R. Wright> > GMC Great Laker =
MHC> > GMCGL Tech Editor> > GMC Eastern States Charter Member> > GMCMI> > 7=
8 GMC Buskirk 29.5=E2=80=99 Stretch> > 75 GMC Avion (Under Reconstruction)>=
> Michigan> >> >> > > On Nov 3, 2020, at 8:24 AM, Todd Snyder via Gmclist =
> gmclist> wrote:> > >> > > It may be an option to chang=
e the driven gear, on the transmission, to> > one with more teeth so that i=
t will slow the turn rate of the cable.> > >> > > They are about $10.> > > =
--> > > Todd Snyder, Buffalo NY> > > 1976 Eleganza II> > >> > > ___________=
____________________________________> > > GMCnet mailing list> > > Unsubscr=
ibe or Change List Options:> > > http://list.gmcnet.org/mailman/listinfo/gm=
clist_list.gmcnet.org> >> >> > ____________________________________________=
___> > GMCnet mailing list> > Unsubscribe or Change List Options:> > http:/=
/list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org> >>>> --> Bruce H=
art> 1976 Palm Beach> Milliken, Co> GMC Got More Class> _________________=
______________________________> GMCnet mailing list> Unsubscribe or Change =
List Options:> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.=
org>-- Jim KanomataApplied/GMC, Newark,CAjimk://w=
ww.gmcrvparts.com1-800-752-7502____________________________________________=
___GMCnet mailing listUnsubscribe or Change List Options:http://list.gmcnet=
.org/mailman/listinfo/gmclist_list.gmcnet.org
=C2=A0 If I'm correct I think I need a .879 reducer.Sent from my U.S.Cellu=
lar=C2=A9 Smartphone -------- Original message --------From: Jim Kanomata=
via Gmclist Date: 11/3/20 10:42 AM (GMT-06:00)=
To: gmclist Cc: Jim Kanomata Subje=
ct: Re: [GMCnet] Speedometer Gear Reducer Adapter Bruce,Yes, the gears are =
available, but those teeth counts way off what we needto correct.I can get =
the odometer to read within 2-4% by ordering in the right gearcombination i=
n the reducer.I help lot of people with them.On Tue, Nov 3, 2020 at 7:31 AM=
Bruce Hart via Gmclist wrote:> Summitt has these=
gears:>>=C2=A0 https://www.summitracing.com/parts/tci-880031> 880029=C2=
=A0 41 tooth> 880030=C2=A0 42 tooth> 880031=C2=A0 43 tooth> 880032=C2=A0 45=
tooth> 880013=C2=A0 44 tooth>>>> On Tue, Nov 3, 2020 at 7:49 AM John Wrigh=
t via Gmclist gmclist> wrote:>> > There are at least 3 s=
peedometer gears available from your GMC dealer for> > the 425 trans.=C2=
=A0 There is a yellow, white and I think a light blue> > available. One is =
stock, one is a lower gear and one is a higher gear.=C2=A0 I> > look for th=
e information this morning and came up short.=C2=A0 Call Jim K and> he> > m=
ay be able to help you or call Manny.> >> > J.R. Wright> > GMC Great Laker =
MHC> > GMCGL Tech Editor> > GMC Eastern States Charter Member> > GMCMI> > 7=
8 GMC Buskirk 29.5=E2=80=99 Stretch> > 75 GMC Avion (Under Reconstruction)>=
> Michigan> >> >> > > On Nov 3, 2020, at 8:24 AM, Todd Snyder via Gmclist =
> gmclist> wrote:> > >> > > It may be an option to chang=
e the driven gear, on the transmission, to> > one with more teeth so that i=
t will slow the turn rate of the cable.> > >> > > They are about $10.> > > =
--> > > Todd Snyder, Buffalo NY> > > 1976 Eleganza II> > >> > > ___________=
____________________________________> > > GMCnet mailing list> > > Unsubscr=
ibe or Change List Options:> > > http://list.gmcnet.org/mailman/listinfo/gm=
clist_list.gmcnet.org> >> >> > ____________________________________________=
___> > GMCnet mailing list> > Unsubscribe or Change List Options:> > http:/=
/list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org> >>>> --> Bruce H=
art> 1976 Palm Beach> Milliken, Co> GMC Got More Class> _________________=
______________________________> GMCnet mailing list> Unsubscribe or Change =
List Options:> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.=
org>-- Jim KanomataApplied/GMC, Newark,CAjimk://w=
ww.gmcrvparts.com1-800-752-7502____________________________________________=
___GMCnet mailing listUnsubscribe or Change List Options:http://list.gmcnet=
.org/mailman/listinfo/gmclist_list.gmcnet.org
I don't think the mph reading is the first thing to correct. The first thing to get right is the odometer. That's a direct geared readout of
distance traveled. It needs to be correct before the speedometer reading can be addressed if needed.
You could get on the highway, take note of the odometer as you pass a mile marker. Drive 10 miles and note the odometer reading. Subtract one
reading from the other, figure out the % difference and get a driven gear with that % more or less teeth, depending on which way you need it to go.
Then pull your current driven gear out and count the teeth.
If the odometer is reading low, you need fewer teeth on the driven gear. If the odometer reads high, you need more teeth. You may or may not be
able to get it corrected with the driven gear though, the drive gear only works for a certain range of tooth numbers. Looking online there are
transmission parts stores that offer assistance with this. They'll know what range of teeth numbers will fit with what you have and sell you the
gear
There are also online calculators that can determine the correct driven gear to use but you need to know the number of teeth on the drive gear so they
won't be much help unless you use them to figure out what's in there by trial and error, which you can do.
--
Todd Snyder, Buffalo NY
1976 Eleganza II
distance traveled. It needs to be correct before the speedometer reading can be addressed if needed.
You could get on the highway, take note of the odometer as you pass a mile marker. Drive 10 miles and note the odometer reading. Subtract one
reading from the other, figure out the % difference and get a driven gear with that % more or less teeth, depending on which way you need it to go.
Then pull your current driven gear out and count the teeth.
If the odometer is reading low, you need fewer teeth on the driven gear. If the odometer reads high, you need more teeth. You may or may not be
able to get it corrected with the driven gear though, the drive gear only works for a certain range of tooth numbers. Looking online there are
transmission parts stores that offer assistance with this. They'll know what range of teeth numbers will fit with what you have and sell you the
gear
There are also online calculators that can determine the correct driven gear to use but you need to know the number of teeth on the drive gear so they
won't be much help unless you use them to figure out what's in there by trial and error, which you can do.
--
Todd Snyder, Buffalo NY
1976 Eleganza II
You are correct. Set things by the odometer. I used my gps rather than a mile marker. I have found that mile marked often are off by .2 miles. After setting it I checked it by mile markers 100 miles apart. It was within 0.1 miles.
Once you have the gps for ten miles record the odometer reading at that point. I had an adapter from Jim Kanometer and I just sent it back to him and gave him my odometer reading for 10 miles on the gps. He changed gears in it and it was right on
Emery Stora
>
> I don't think the mph reading is the first thing to correct. The first thing to get right is the odometer. That's a direct geared readout of
> distance traveled. It needs to be correct before the speedometer reading can be addressed if needed.
>
> You could get on the highway, take note of the odometer as you pass a mile marker. Drive 10 miles and note the odometer reading. Subtract one
> reading from the other, figure out the % difference and get a driven gear with that % more or less teeth, depending on which way you need it to go.
>
> Then pull your current driven gear out and count the teeth.
>
> If the odometer is reading low, you need fewer teeth on the driven gear. If the odometer reads high, you need more teeth. You may or may not be
> able to get it corrected with the driven gear though, the drive gear only works for a certain range of tooth numbers. Looking online there are
> transmission parts stores that offer assistance with this. They'll know what range of teeth numbers will fit with what you have and sell you the
> gear
>
> There are also online calculators that can determine the correct driven gear to use but you need to know the number of teeth on the drive gear so they
> won't be much help unless you use them to figure out what's in there by trial and error, which you can do.
>
>
>
> --
> Todd Snyder, Buffalo NY
> 1976 Eleganza II
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
Once you have the gps for ten miles record the odometer reading at that point. I had an adapter from Jim Kanometer and I just sent it back to him and gave him my odometer reading for 10 miles on the gps. He changed gears in it and it was right on
Emery Stora
>
> I don't think the mph reading is the first thing to correct. The first thing to get right is the odometer. That's a direct geared readout of
> distance traveled. It needs to be correct before the speedometer reading can be addressed if needed.
>
> You could get on the highway, take note of the odometer as you pass a mile marker. Drive 10 miles and note the odometer reading. Subtract one
> reading from the other, figure out the % difference and get a driven gear with that % more or less teeth, depending on which way you need it to go.
>
> Then pull your current driven gear out and count the teeth.
>
> If the odometer is reading low, you need fewer teeth on the driven gear. If the odometer reads high, you need more teeth. You may or may not be
> able to get it corrected with the driven gear though, the drive gear only works for a certain range of tooth numbers. Looking online there are
> transmission parts stores that offer assistance with this. They'll know what range of teeth numbers will fit with what you have and sell you the
> gear
>
> There are also online calculators that can determine the correct driven gear to use but you need to know the number of teeth on the drive gear so they
> won't be much help unless you use them to figure out what's in there by trial and error, which you can do.
>
>
>
> --
> Todd Snyder, Buffalo NY
> 1976 Eleganza II
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
Todd, your correct on what you say.
Majority of the customers care mainly for what the speed reads, so I do as
they want.
On Thu, Nov 5, 2020 at 3:47 PM Emery Stora via Gmclist <
> You are correct. Set things by the odometer. I used my gps rather than a
> mile marker. I have found that mile marked often are off by .2 miles. After
> setting it I checked it by mile markers 100 miles apart. It was within 0.1
> miles.
> Once you have the gps for ten miles record the odometer reading at that
> point. I had an adapter from Jim Kanometer and I just sent it back to him
> and gave him my odometer reading for 10 miles on the gps. He changed gears
> in it and it was right on
>
> Emery Stora
>
> > On Nov 5, 2020, at 2:52 PM, Todd Snyder via Gmclist <
> >
> > I don't think the mph reading is the first thing to correct. The
> first thing to get right is the odometer. That's a direct geared readout of
> > distance traveled. It needs to be correct before the speedometer
> reading can be addressed if needed.
> >
> > You could get on the highway, take note of the odometer as you pass a
> mile marker. Drive 10 miles and note the odometer reading. Subtract one
> > reading from the other, figure out the % difference and get a driven
> gear with that % more or less teeth, depending on which way you need it to
> go.
> >
> > Then pull your current driven gear out and count the teeth.
> >
> > If the odometer is reading low, you need fewer teeth on the driven
> gear. If the odometer reads high, you need more teeth. You may or may
> not be
> > able to get it corrected with the driven gear though, the drive gear
> only works for a certain range of tooth numbers. Looking online there are
> > transmission parts stores that offer assistance with this. They'll know
> what range of teeth numbers will fit with what you have and sell you the
> > gear
> >
> > There are also online calculators that can determine the correct driven
> gear to use but you need to know the number of teeth on the drive gear so
> they
> > won't be much help unless you use them to figure out what's in there by
> trial and error, which you can do.
> >
> >
> >
> > --
> > Todd Snyder, Buffalo NY
> > 1976 Eleganza II
> >
> > _______________________________________________
> > GMCnet mailing list
> > Unsubscribe or Change List Options:
> > http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
--
Jim Kanomata
Applied/GMC, Newark,CA
jimk
http://www.gmcrvparts.com
1-800-752-7502
Majority of the customers care mainly for what the speed reads, so I do as
they want.
On Thu, Nov 5, 2020 at 3:47 PM Emery Stora via Gmclist <
> You are correct. Set things by the odometer. I used my gps rather than a
> mile marker. I have found that mile marked often are off by .2 miles. After
> setting it I checked it by mile markers 100 miles apart. It was within 0.1
> miles.
> Once you have the gps for ten miles record the odometer reading at that
> point. I had an adapter from Jim Kanometer and I just sent it back to him
> and gave him my odometer reading for 10 miles on the gps. He changed gears
> in it and it was right on
>
> Emery Stora
>
> > On Nov 5, 2020, at 2:52 PM, Todd Snyder via Gmclist <
> >
> > I don't think the mph reading is the first thing to correct. The
> first thing to get right is the odometer. That's a direct geared readout of
> > distance traveled. It needs to be correct before the speedometer
> reading can be addressed if needed.
> >
> > You could get on the highway, take note of the odometer as you pass a
> mile marker. Drive 10 miles and note the odometer reading. Subtract one
> > reading from the other, figure out the % difference and get a driven
> gear with that % more or less teeth, depending on which way you need it to
> go.
> >
> > Then pull your current driven gear out and count the teeth.
> >
> > If the odometer is reading low, you need fewer teeth on the driven
> gear. If the odometer reads high, you need more teeth. You may or may
> not be
> > able to get it corrected with the driven gear though, the drive gear
> only works for a certain range of tooth numbers. Looking online there are
> > transmission parts stores that offer assistance with this. They'll know
> what range of teeth numbers will fit with what you have and sell you the
> > gear
> >
> > There are also online calculators that can determine the correct driven
> gear to use but you need to know the number of teeth on the drive gear so
> they
> > won't be much help unless you use them to figure out what's in there by
> trial and error, which you can do.
> >
> >
> >
> > --
> > Todd Snyder, Buffalo NY
> > 1976 Eleganza II
> >
> > _______________________________________________
> > GMCnet mailing list
> > Unsubscribe or Change List Options:
> > http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
--
Jim Kanomata
Applied/GMC, Newark,CA
jimk
http://www.gmcrvparts.com
1-800-752-7502
When I redid our dash board, I replaced the stock speedo with a GPS speedo from SpeedHut. I have checked it against our travel GPS and against radar
speed reminders and found it to be right on. Down side is it won't register speed in tunnels, so in those very few times, I go a little slower than
traffic. A GPS doesn't care what gears or tires you are running only if you can see the sky. JWID
--
Larry
78 Royale w/500 Caddy
Menomonie, WI.
speed reminders and found it to be right on. Down side is it won't register speed in tunnels, so in those very few times, I go a little slower than
traffic. A GPS doesn't care what gears or tires you are running only if you can see the sky. JWID
--
Larry
78 Royale w/500 Caddy
Menomonie, WI.
This makes sense.=C2=A0 I haven't changed anything yet and now the coach is=
in winter storage.=C2=A0 I'll continue in spring starting with correcting =
the miles.Thanks everyone=C2=A0Sent from my U.S.Cellular=C2=A9 Smartphone=
-------- Original message --------From: Emery Stora via Gmclist Date: 11/5/20 5:47 PM (GMT-06:00) To: gmclist=
et.org Cc: Emery Stora Subject: Re: [GMCnet] Speedo=
meter Gear Reducer Adapter You are correct. Set things by the odometer. I u=
sed my gps rather than a mile marker. I have found that mile marked often a=
re off by .2 miles. After setting it I checked it by mile markers 100 miles=
apart. It was within 0.1 miles. Once you have the gps for ten miles record=
the odometer reading at that point. I had an adapter from Jim Kanometer an=
d I just sent it back to him and gave him my odometer reading for 10 miles =
on the gps. He changed gears in it and it was right on Emery Stora> On Nov =
5, 2020, at 2:52 PM, Todd Snyder via Gmclist wrot=
e:> > =EF=BB=BFI don't think the mph reading is the first thing to correct.=
=C2=A0=C2=A0 The first thing to get right is the odometer.=C2=A0 That's a d=
irect geared readout of> distance traveled.=C2=A0 It needs to be correct be=
fore the speedometer reading can be addressed if needed.=C2=A0 > > You coul=
d get on the highway, take note of the odometer as you pass a mile marker.=
=C2=A0=C2=A0 Drive 10 miles and note the odometer reading. Subtract one> re=
ading from the other, figure out the % difference and get a driven gear wit=
h that % more or less teeth, depending on which way you need it to go.=
=C2=A0 > > Then pull your current driven gear out and count the teeth.=
=C2=A0 > > If the odometer is reading low, you need fewer teeth on the driv=
en gear.=C2=A0=C2=A0 If the odometer reads high, you need more teeth.=C2=
=A0 You may or may not be> able to get it corrected with the driven gear th=
ough, the drive gear only works for a certain range of tooth numbers. Looki=
ng online there are> transmission parts stores that offer assistance with t=
his.=C2=A0 They'll know what range of teeth numbers will fit with what you =
have and sell you the> gear> > There are also online calculators that can d=
etermine the correct driven gear to use but you need to know the number of =
teeth on the drive gear so they> won't be much help unless you use them to =
figure out what's in there by trial and error, which you can do. > > > > --=
> Todd Snyder, Buffalo NY > 1976 Eleganza II> > __________________________=
_____________________> GMCnet mailing list> Unsubscribe or Change List Opti=
ons:> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org______=
_________________________________________GMCnet mailing listUnsubscribe or =
Change List Options:http://list.gmcnet.org/mailman/listinfo/gmclist_list.gm=
cnet.org
in winter storage.=C2=A0 I'll continue in spring starting with correcting =
the miles.Thanks everyone=C2=A0Sent from my U.S.Cellular=C2=A9 Smartphone=
-------- Original message --------From: Emery Stora via Gmclist Date: 11/5/20 5:47 PM (GMT-06:00) To: gmclist=
et.org Cc: Emery Stora Subject: Re: [GMCnet] Speedo=
meter Gear Reducer Adapter You are correct. Set things by the odometer. I u=
sed my gps rather than a mile marker. I have found that mile marked often a=
re off by .2 miles. After setting it I checked it by mile markers 100 miles=
apart. It was within 0.1 miles. Once you have the gps for ten miles record=
the odometer reading at that point. I had an adapter from Jim Kanometer an=
d I just sent it back to him and gave him my odometer reading for 10 miles =
on the gps. He changed gears in it and it was right on Emery Stora> On Nov =
5, 2020, at 2:52 PM, Todd Snyder via Gmclist wrot=
e:> > =EF=BB=BFI don't think the mph reading is the first thing to correct.=
=C2=A0=C2=A0 The first thing to get right is the odometer.=C2=A0 That's a d=
irect geared readout of> distance traveled.=C2=A0 It needs to be correct be=
fore the speedometer reading can be addressed if needed.=C2=A0 > > You coul=
d get on the highway, take note of the odometer as you pass a mile marker.=
=C2=A0=C2=A0 Drive 10 miles and note the odometer reading. Subtract one> re=
ading from the other, figure out the % difference and get a driven gear wit=
h that % more or less teeth, depending on which way you need it to go.=
=C2=A0 > > Then pull your current driven gear out and count the teeth.=
=C2=A0 > > If the odometer is reading low, you need fewer teeth on the driv=
en gear.=C2=A0=C2=A0 If the odometer reads high, you need more teeth.=C2=
=A0 You may or may not be> able to get it corrected with the driven gear th=
ough, the drive gear only works for a certain range of tooth numbers. Looki=
ng online there are> transmission parts stores that offer assistance with t=
his.=C2=A0 They'll know what range of teeth numbers will fit with what you =
have and sell you the> gear> > There are also online calculators that can d=
etermine the correct driven gear to use but you need to know the number of =
teeth on the drive gear so they> won't be much help unless you use them to =
figure out what's in there by trial and error, which you can do. > > > > --=
> Todd Snyder, Buffalo NY > 1976 Eleganza II> > __________________________=
_____________________> GMCnet mailing list> Unsubscribe or Change List Opti=
ons:> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org______=
_________________________________________GMCnet mailing listUnsubscribe or =
Change List Options:http://list.gmcnet.org/mailman/listinfo/gmclist_list.gm=
cnet.org
Quick question.....how many teeth does the oem gear have?Sent from my U.S.=
Cellular=C2=A9 Smartphone -------- Original message --------From: Todd Sn=
yder via Gmclist Date: 11/5/20 3:52 PM (GMT-06:=
00) To: gmclist Cc: Todd Snyder Subj=
ect: Re: [GMCnet] Speedometer Gear Reducer Adapter I don't think the mph re=
ading is the first thing to correct.=C2=A0=C2=A0 The first thing to get rig=
ht is the odometer.=C2=A0 That's a direct geared readout ofdistance travele=
d.=C2=A0 It needs to be correct before the speedometer reading can be addre=
ssed if needed.=C2=A0 You could get on the highway, take note of the odomet=
er as you pass a mile marker.=C2=A0=C2=A0 Drive 10 miles and note the odome=
ter reading. Subtract onereading from the other, figure out the % differenc=
e and get a driven gear with that % more or less teeth, depending on which =
way you need it to go.=C2=A0 Then pull your current driven gear out and cou=
nt the teeth.=C2=A0 If the odometer is reading low, you need fewer teeth on=
the driven gear.=C2=A0=C2=A0 If the odometer reads high, you need more tee=
th.=C2=A0 You may or may not beable to get it corrected with the driven gea=
r though, the drive gear only works for a certain range of tooth numbers. L=
ooking online there aretransmission parts stores that offer assistance with=
this.=C2=A0 They'll know what range of teeth numbers will fit with what yo=
u have and sell you thegearThere are also online calculators that can deter=
mine the correct driven gear to use but you need to know the number of teet=
h on the drive gear so theywon't be much help unless you use them to figure=
out what's in there by trial and error, which you can do. -- Todd Snyder, =
Buffalo NY 1976 Eleganza II_______________________________________________G=
MCnet mailing listUnsubscribe or Change List Options:http://list.gmcnet.org=
/mailman/listinfo/gmclist_list.gmcnet.org
Cellular=C2=A9 Smartphone -------- Original message --------From: Todd Sn=
yder via Gmclist Date: 11/5/20 3:52 PM (GMT-06:=
00) To: gmclist Cc: Todd Snyder Subj=
ect: Re: [GMCnet] Speedometer Gear Reducer Adapter I don't think the mph re=
ading is the first thing to correct.=C2=A0=C2=A0 The first thing to get rig=
ht is the odometer.=C2=A0 That's a direct geared readout ofdistance travele=
d.=C2=A0 It needs to be correct before the speedometer reading can be addre=
ssed if needed.=C2=A0 You could get on the highway, take note of the odomet=
er as you pass a mile marker.=C2=A0=C2=A0 Drive 10 miles and note the odome=
ter reading. Subtract onereading from the other, figure out the % differenc=
e and get a driven gear with that % more or less teeth, depending on which =
way you need it to go.=C2=A0 Then pull your current driven gear out and cou=
nt the teeth.=C2=A0 If the odometer is reading low, you need fewer teeth on=
the driven gear.=C2=A0=C2=A0 If the odometer reads high, you need more tee=
th.=C2=A0 You may or may not beable to get it corrected with the driven gea=
r though, the drive gear only works for a certain range of tooth numbers. L=
ooking online there aretransmission parts stores that offer assistance with=
this.=C2=A0 They'll know what range of teeth numbers will fit with what yo=
u have and sell you thegearThere are also online calculators that can deter=
mine the correct driven gear to use but you need to know the number of teet=
h on the drive gear so theywon't be much help unless you use them to figure=
out what's in there by trial and error, which you can do. -- Todd Snyder, =
Buffalo NY 1976 Eleganza II_______________________________________________G=
MCnet mailing listUnsubscribe or Change List Options:http://list.gmcnet.org=
/mailman/listinfo/gmclist_list.gmcnet.org
OEM ones are light tan/white 31 teeth
On Sat, Nov 7, 2020 at 7:40 AM 78gmcroyale via Gmclist <
> Quick question.....how many teeth does the oem gear have?Sent from my
> U.S.Cellular© Smartphone
> -------- Original message --------From: Todd Snyder via Gmclist <
> gmclist> Date: 11/5/20 3:52 PM (GMT-06:00) To:
> gmclist Cc: Todd Snyder Subject:
> Re: [GMCnet] Speedometer Gear Reducer Adapter I don't think the mph reading
> is the first thing to correct. The first thing to get right is the
> odometer. That's a direct geared readout ofdistance traveled. It needs to
> be correct before the speedometer reading can be addressed if needed. You
> could get on the highway, take note of the odometer as you pass a mile
> marker. Drive 10 miles and note the odometer reading. Subtract onereading
> from the other, figure out the % difference and get a driven gear with that
> % more or less teeth, depending on which way you need it to go. Then pull
> your current driven gear out and count the teeth. If the odometer is
> reading low, you need fewer teeth on the driven gear. If the odometer
> reads high, you need more teeth. You may or may not beable to get it
> corrected with the driven gear though, the drive gear only works for a
> certain range of tooth numbers. Looking online there aretransmission parts
> stores that offer assistance with this. They'll know what range of teeth
> numbers will fit with what you have and sell you thegearThere are also
> online calculators that can determine the correct driven gear to use but
> you need to know the number of teeth on the drive gear so theywon't be much
> help unless you use them to figure out what's in there by trial and error,
> which you can do. -- Todd Snyder, Buffalo NY 1976 Eleganza
> II_______________________________________________GMCnet mailing
> listUnsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
--
Jim Kanomata
Applied/GMC, Newark,CA
jimk
http://www.gmcrvparts.com
1-800-752-7502
On Sat, Nov 7, 2020 at 7:40 AM 78gmcroyale via Gmclist <
> Quick question.....how many teeth does the oem gear have?Sent from my
> U.S.Cellular© Smartphone
> -------- Original message --------From: Todd Snyder via Gmclist <
> gmclist> Date: 11/5/20 3:52 PM (GMT-06:00) To:
> gmclist Cc: Todd Snyder Subject:
> Re: [GMCnet] Speedometer Gear Reducer Adapter I don't think the mph reading
> is the first thing to correct. The first thing to get right is the
> odometer. That's a direct geared readout ofdistance traveled. It needs to
> be correct before the speedometer reading can be addressed if needed. You
> could get on the highway, take note of the odometer as you pass a mile
> marker. Drive 10 miles and note the odometer reading. Subtract onereading
> from the other, figure out the % difference and get a driven gear with that
> % more or less teeth, depending on which way you need it to go. Then pull
> your current driven gear out and count the teeth. If the odometer is
> reading low, you need fewer teeth on the driven gear. If the odometer
> reads high, you need more teeth. You may or may not beable to get it
> corrected with the driven gear though, the drive gear only works for a
> certain range of tooth numbers. Looking online there aretransmission parts
> stores that offer assistance with this. They'll know what range of teeth
> numbers will fit with what you have and sell you thegearThere are also
> online calculators that can determine the correct driven gear to use but
> you need to know the number of teeth on the drive gear so theywon't be much
> help unless you use them to figure out what's in there by trial and error,
> which you can do. -- Todd Snyder, Buffalo NY 1976 Eleganza
> II_______________________________________________GMCnet mailing
> listUnsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
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--
Jim Kanomata
Applied/GMC, Newark,CA
jimk
http://www.gmcrvparts.com
1-800-752-7502
I'm very confused by this statement....=C2=A0"=EF=BB=BFI don't think the mp=
h reading is the first thing to correct.=C2=A0=C2=A0 The first thing to get=
right is the odometer.=C2=A0 That's a direct geared readout ofdistance tra=
veled.=C2=A0 It needs to be correct before the speedometer reading can be a=
ddressed if needed."The speedometer cable feeds the speedometer and it's ra=
te of spinning determines miles and mph.=C2=A0 It can't differentiate betwe=
en the two.=C2=A0 If mph is correct then mileage should be correct and if m=
ileage is correct then mph should be correct.=C2=A0 I don't understand how =
you can first fix one and then fix the other.What am I missing?Sent from my=
U.S.Cellular=C2=A9 Smartphone -------- Original message --------From: E=
mery Stora via Gmclist Date: 11/5/20 5:47 PM (G=
MT-06:00) To: gmclist Cc: Emery Stora Subject: Re: [GMCnet] Speedometer Gear Reducer Adapter You are correct. =
Set things by the odometer. I used my gps rather than a mile marker. I have=
found that mile marked often are off by .2 miles. After setting it I check=
ed it by mile markers 100 miles apart. It was within 0.1 miles. Once you ha=
ve the gps for ten miles record the odometer reading at that point. I had a=
n adapter from Jim Kanometer and I just sent it back to him and gave him my=
odometer reading for 10 miles on the gps. He changed gears in it and it wa=
s right on Emery Stora> On Nov 5, 2020, at 2:52 PM, Todd Snyder via Gmclist=
wrote:> > =EF=BB=BFI don't think the mph reading=
is the first thing to correct.=C2=A0=C2=A0 The first thing to get right is=
the odometer.=C2=A0 That's a direct geared readout of> distance traveled.=
=C2=A0 It needs to be correct before the speedometer reading can be address=
ed if needed.=C2=A0 > > You could get on the highway, take note of the odom=
eter as you pass a mile marker.=C2=A0=C2=A0 Drive 10 miles and note the odo=
meter reading. Subtract one> reading from the other, figure out the % diffe=
rence and get a driven gear with that % more or less teeth, depending on wh=
ich way you need it to go.=C2=A0 > > Then pull your current driven gear out=
and count the teeth.=C2=A0 > > If the odometer is reading low, you need fe=
wer teeth on the driven gear.=C2=A0=C2=A0 If the odometer reads high, you n=
eed more teeth.=C2=A0 You may or may not be> able to get it corrected with =
the driven gear though, the drive gear only works for a certain range of to=
oth numbers. Looking online there are> transmission parts stores that offer=
assistance with this.=C2=A0 They'll know what range of teeth numbers will =
fit with what you have and sell you the> gear> > There are also online calc=
ulators that can determine the correct driven gear to use but you need to k=
now the number of teeth on the drive gear so they> won't be much help unles=
s you use them to figure out what's in there by trial and error, which you =
can do. > > > > -- > Todd Snyder, Buffalo NY > 1976 Eleganza II> > ________=
_______________________________________> GMCnet mailing list> Unsubscribe o=
r Change List Options:> http://list.gmcnet.org/mailman/listinfo/gmclist_lis=
t.gmcnet.org_______________________________________________GMCnet mailing l=
istUnsubscribe or Change List Options:http://list.gmcnet.org/mailman/listin=
fo/gmclist_list.gmcnet.org
h reading is the first thing to correct.=C2=A0=C2=A0 The first thing to get=
right is the odometer.=C2=A0 That's a direct geared readout ofdistance tra=
veled.=C2=A0 It needs to be correct before the speedometer reading can be a=
ddressed if needed."The speedometer cable feeds the speedometer and it's ra=
te of spinning determines miles and mph.=C2=A0 It can't differentiate betwe=
en the two.=C2=A0 If mph is correct then mileage should be correct and if m=
ileage is correct then mph should be correct.=C2=A0 I don't understand how =
you can first fix one and then fix the other.What am I missing?Sent from my=
U.S.Cellular=C2=A9 Smartphone -------- Original message --------From: E=
mery Stora via Gmclist Date: 11/5/20 5:47 PM (G=
MT-06:00) To: gmclist Cc: Emery Stora Subject: Re: [GMCnet] Speedometer Gear Reducer Adapter You are correct. =
Set things by the odometer. I used my gps rather than a mile marker. I have=
found that mile marked often are off by .2 miles. After setting it I check=
ed it by mile markers 100 miles apart. It was within 0.1 miles. Once you ha=
ve the gps for ten miles record the odometer reading at that point. I had a=
n adapter from Jim Kanometer and I just sent it back to him and gave him my=
odometer reading for 10 miles on the gps. He changed gears in it and it wa=
s right on Emery Stora> On Nov 5, 2020, at 2:52 PM, Todd Snyder via Gmclist=
wrote:> > =EF=BB=BFI don't think the mph reading=
is the first thing to correct.=C2=A0=C2=A0 The first thing to get right is=
the odometer.=C2=A0 That's a direct geared readout of> distance traveled.=
=C2=A0 It needs to be correct before the speedometer reading can be address=
ed if needed.=C2=A0 > > You could get on the highway, take note of the odom=
eter as you pass a mile marker.=C2=A0=C2=A0 Drive 10 miles and note the odo=
meter reading. Subtract one> reading from the other, figure out the % diffe=
rence and get a driven gear with that % more or less teeth, depending on wh=
ich way you need it to go.=C2=A0 > > Then pull your current driven gear out=
and count the teeth.=C2=A0 > > If the odometer is reading low, you need fe=
wer teeth on the driven gear.=C2=A0=C2=A0 If the odometer reads high, you n=
eed more teeth.=C2=A0 You may or may not be> able to get it corrected with =
the driven gear though, the drive gear only works for a certain range of to=
oth numbers. Looking online there are> transmission parts stores that offer=
assistance with this.=C2=A0 They'll know what range of teeth numbers will =
fit with what you have and sell you the> gear> > There are also online calc=
ulators that can determine the correct driven gear to use but you need to k=
now the number of teeth on the drive gear so they> won't be much help unles=
s you use them to figure out what's in there by trial and error, which you =
can do. > > > > -- > Todd Snyder, Buffalo NY > 1976 Eleganza II> > ________=
_______________________________________> GMCnet mailing list> Unsubscribe o=
r Change List Options:> http://list.gmcnet.org/mailman/listinfo/gmclist_lis=
t.gmcnet.org_______________________________________________GMCnet mailing l=
istUnsubscribe or Change List Options:http://list.gmcnet.org/mailman/listin=
fo/gmclist_list.gmcnet.org
The odometer is connected to the tires through a series of mechanical
connections (gears, shafts), so it must correspond exactly to the rotation
of the tires. When adjusted for the effective circumference of the tires,
it should yield an exact distance travelled. The Speedometer, on the other
hand, is driven through that same sequence of mechanical devices, but the
last stage is a magnet rotating past a disk which is attached to the
spring-loaded needle. That is NOT a solid or certain way of connecting
devices together. If the magnet and disk are slightly too close, the speed
will read high (a weak spring will have that same effect); too far apart
yields a slow speed indication.
HTH,
Ken H.
On Sun, Nov 8, 2020 at 10:54 AM 78gmcroyale via Gmclist <
> I'm very confused by this statement.... "I don't think the mph reading is
> the first thing to correct. The first thing to get right is the
> odometer. That's a direct geared readout ofdistance traveled. It needs to
> be correct before the speedometer reading can be addressed if needed."The
> speedometer cable feeds the speedometer and it's rate of spinning
> determines miles and mph. It can't differentiate between the two. If mph
> is correct then mileage should be correct and if mileage is correct then
> mph should be correct. I don't understand how you can first fix one and
> then fix the other.What am I missing?Sent from my U.S.Cellular© Smartphone
> -------- Original message --------From: Emery Stora via Gmclist <
> gmclist> Date: 11/5/20 5:47 PM (GMT-06:00) To:
> gmclist Cc: Emery Stora Subject:
> Re: [GMCnet] Speedometer Gear Reducer Adapter You are correct. Set things
> by the odometer. I used my gps rather than a mile marker. I have found that
> mile marked often are off by .2 miles. After setting it I checked it by
> mile markers 100 miles apart. It was within 0.1 miles. Once you have the
> gps for ten miles record the odometer reading at that point. I had an
> adapter from Jim Kanometer and I just sent it back to him and gave him my
> odometer reading for 10 miles on the gps. He changed gears in it and it was
> right on Emery Stora> On Nov 5, 2020, at 2:52 PM, Todd Snyder via Gmclist <
> gmclist> wrote:> > I don't think the mph reading is the
> first thing to correct. The first thing to get right is the odometer.
> That's a direct geared readout of> distance traveled. It needs to be
> correct before the speedometer reading can be addressed if needed. > > You
> could get on the highway, take note of the odometer as you pass a mile
> marker. Drive 10 miles and note the odometer reading. Subtract one>
> reading from the other, figure out the % difference and get a driven gear
> with that % more or less teeth, depending on which way you need it to go.
> > > Then pull your current driven gear out and count the teeth. > > If the
> odometer is reading low, you need fewer teeth on the driven gear. If the
> odometer reads high, you need more teeth. You may or may not be> able to
> get it corrected with the driven gear though, the drive gear only works for
> a certain range of tooth numbers. Looking online there are> transmission
> parts stores that offer assistance with this. They'll know what range of
> teeth numbers will fit with what you have and sell you the> gear> > There
> are also online calculators that can determine the correct driven gear to
> use but you need to know the number of teeth on the drive gear so they>
> won't be much help unless you use them to figure out what's in there by
> trial and error, which you can do. > > > > -- > Todd Snyder, Buffalo NY >
> 1976 Eleganza II> > _______________________________________________> GMCnet
> mailing list> Unsubscribe or Change List Options:>
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org_______________________________________________GMCnet
> mailing listUnsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
connections (gears, shafts), so it must correspond exactly to the rotation
of the tires. When adjusted for the effective circumference of the tires,
it should yield an exact distance travelled. The Speedometer, on the other
hand, is driven through that same sequence of mechanical devices, but the
last stage is a magnet rotating past a disk which is attached to the
spring-loaded needle. That is NOT a solid or certain way of connecting
devices together. If the magnet and disk are slightly too close, the speed
will read high (a weak spring will have that same effect); too far apart
yields a slow speed indication.
HTH,
Ken H.
On Sun, Nov 8, 2020 at 10:54 AM 78gmcroyale via Gmclist <
> I'm very confused by this statement.... "I don't think the mph reading is
> the first thing to correct. The first thing to get right is the
> odometer. That's a direct geared readout ofdistance traveled. It needs to
> be correct before the speedometer reading can be addressed if needed."The
> speedometer cable feeds the speedometer and it's rate of spinning
> determines miles and mph. It can't differentiate between the two. If mph
> is correct then mileage should be correct and if mileage is correct then
> mph should be correct. I don't understand how you can first fix one and
> then fix the other.What am I missing?Sent from my U.S.Cellular© Smartphone
> -------- Original message --------From: Emery Stora via Gmclist <
> gmclist> Date: 11/5/20 5:47 PM (GMT-06:00) To:
> gmclist Cc: Emery Stora Subject:
> Re: [GMCnet] Speedometer Gear Reducer Adapter You are correct. Set things
> by the odometer. I used my gps rather than a mile marker. I have found that
> mile marked often are off by .2 miles. After setting it I checked it by
> mile markers 100 miles apart. It was within 0.1 miles. Once you have the
> gps for ten miles record the odometer reading at that point. I had an
> adapter from Jim Kanometer and I just sent it back to him and gave him my
> odometer reading for 10 miles on the gps. He changed gears in it and it was
> right on Emery Stora> On Nov 5, 2020, at 2:52 PM, Todd Snyder via Gmclist <
> gmclist> wrote:> > I don't think the mph reading is the
> first thing to correct. The first thing to get right is the odometer.
> That's a direct geared readout of> distance traveled. It needs to be
> correct before the speedometer reading can be addressed if needed. > > You
> could get on the highway, take note of the odometer as you pass a mile
> marker. Drive 10 miles and note the odometer reading. Subtract one>
> reading from the other, figure out the % difference and get a driven gear
> with that % more or less teeth, depending on which way you need it to go.
> > > Then pull your current driven gear out and count the teeth. > > If the
> odometer is reading low, you need fewer teeth on the driven gear. If the
> odometer reads high, you need more teeth. You may or may not be> able to
> get it corrected with the driven gear though, the drive gear only works for
> a certain range of tooth numbers. Looking online there are> transmission
> parts stores that offer assistance with this. They'll know what range of
> teeth numbers will fit with what you have and sell you the> gear> > There
> are also online calculators that can determine the correct driven gear to
> use but you need to know the number of teeth on the drive gear so they>
> won't be much help unless you use them to figure out what's in there by
> trial and error, which you can do. > > > > -- > Todd Snyder, Buffalo NY >
> 1976 Eleganza II> > _______________________________________________> GMCnet
> mailing list> Unsubscribe or Change List Options:>
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org_______________________________________________GMCnet
> mailing listUnsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
