Tid Bit. Getting to the top of the mountain. And not over load the engine or transmission.

[Bob Dunahugh]

Think of it this way. You have a 10 speed bike. You shift to a lower ratio. So that it takes less effort for you. The bikes engine. To get down the road. Or up that hill. Thus you. The bikes engine will run cooler. And not be so tired at the top of the hill. The 3:70 FD is an outstanding improvement to any GMC. Towing or not. Mileage goes up because your running a higher intake vacuum. Less load on pistons/bearings. And the water pump is getting more water to the radiator. The same situation for the transmission. Runs cooler with less load. More fluid to the trans cooler. If your running a power drive chain in the transmission. The trans will not get the less load/heat reductions that the 3:70 FD offers. And finally as to transmission loading on steep climbs. NEVER use more then half throttle. NEVER. And except the speed you get.
There is a very old thought that running an engine at higher RPM's is hard on your engine. That idea died in the mid 50's. When compression ratio's went up. Piston technology made great strides. Aluminum pistons were replacing the heavy cast iron ones of the day. Engine lubrication system were greatly improved. Pulling a heavy load like are GMC's at low RPM's. Puts more load on the engine pistons, and bearings. Reduce the load/heat on your engine, and trans. Don't be overly concerned about running the RPM's to the 4000, to 4500 point. I've been in the mountains with a GVW of 17,000 lbs. That's the weight on one and a half GMC's. Using a perfectly stock 403. No headers, no 3 inch exhaust, and no extras engine venting. Bob Dunahugh

 

[john phillips]

Bob,
At 4500 RPM in second gear, you should be close to 65 MPH with a 3.70FD.
At 4000 RPM in second gear, you should be close to 58 MPH with a 3.70FD.

> Think of it this way. You have a 10 speed bike. You shift to a lower
> ratio. So that it takes less effort for you. The bikes engine. To get down
> the road. Or up that hill. Thus you. The bikes engine will run cooler. And
> not be so tired at the top of the hill. The 3:70 FD is an outstanding
> improvement to any GMC. Towing or not. Mileage goes up because your running
> a higher intake vacuum. Less load on pistons/bearings. And the water pump
> is getting more water to the radiator. The same situation for the
> transmission. Runs cooler with less load. More fluid to the trans cooler.
> If your running a power drive chain in the transmission. The trans will
> not get the less load/heat reductions that the 3:70 FD offers. And finally
> as to transmission loading on steep climbs. NEVER use more then half
> throttle. NEVER. And except the speed you get.
> There is a very old thought that running an engine at higher RPM's
> is hard on your engine. That idea died in the mid 50's. When compression
> ratio's went up. Piston technology made great strides. Aluminum pistons
> were replacing the heavy cast iron ones of the day. Engine lubrication
> system were greatly improved. Pulling a heavy load like are GMC's at low
> RPM's. Puts more load on the engine pistons, and bearings. Reduce the
> load/heat on your engine, and trans. Don't be overly concerned about
> running the RPM's to the 4000, to 4500 point. I've been in the mountains
> with a GVW of 17,000 lbs. That's the weight on one and a half GMC's. Using
> a perfectly stock 403. No headers, no 3 inch exhaust, and no extras engine
> venting. Bob Dunahugh
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>

--

*John Phillips*

 

[roy keen]

My main concern with revving a 455 at higher rpms for any length of time is it has a tendency to starv the oil pan of oil. The oil tends to linger in
the rocker arm area under the valve covers unless the engine is modified so the oil will return to the pan sufficiently to keep the oil pump in the
oil. A high volume pump will even amplify the problem a bit more. This is the only reason I would not want to run a 455 at 4500 rpm climbing a long
grade for any length of time otherwise it should not be a concern.
--
Roy Keen
Minden,NV
76 X Glenbrook

 

[john phillips]

I would like an intelegent PSI reading oil pressure gauge that would alarm
if the oil pressure dropped below a setpoint for a given RPM range. I think
that would be an ealier way than to have an oil level reading (electronic
dipstic) that would be acurate while driving up and down hills at highway
speeds.

> My main concern with revving a 455 at higher rpms for any length of time
> is it has a tendency to starv the oil pan of oil. The oil tends to linger in
> the rocker arm area under the valve covers unless the engine is modified
> so the oil will return to the pan sufficiently to keep the oil pump in the
> oil. A high volume pump will even amplify the problem a bit more. This is
> the only reason I would not want to run a 455 at 4500 rpm climbing a long
> grade for any length of time otherwise it should not be a concern.
> --
> Roy Keen
> Minden,NV
> 76 X Glenbrook
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>

--

*John Phillips*

 

[thomas phipps]

John, You could easily design such an oil pressure alarm system, using an Ardunio and buzzer. Depends upon how accurate you think your current oil
pressure sensor is. Ardunio's can read any of the OEM sensors, but you would have to develop the data table. Rhat is the challenge.
Tom
--
2012 Phoenix Cruiser model 2552
KA4CSG

 

[sgltrac]

Sounds an awful lot like the digipanel.

Sully
Bellevue

> John, You could easily design such an oil pressure alarm system, using an
> Ardunio and buzzer. Depends upon how accurate you think your current oil
> pressure sensor is. Ardunio's can read any of the OEM sensors, but you
> would have to develop the data table. Rhat is the challenge.
> Tom
> --
> 2012 Phoenix Cruiser model 2552
> KA4CSG
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>

 

[SteveW]

Bob -

You've got me curious / worried about this: "NEVER use more then half throttle. NEVER. And except the speed you get."

I've got a 23 footer weighing in at 11K or so - with a 455 and a 3.70 Limited Slip final drive. Manny tranny. Patterson carb and HEI distributor.

I've traveled up hills - pedal to the floor (kick down switch disabled) - in high gear and at 3000 RPM or so - and LOW vacuum. Coach seemed to work
just fine. No excessive temperature rise (trans and water) and no noticeable ill effects...

Sounds like I ought not do this... Shift to second gear and keep vacuum up ?? I had been led to believe that keeping RPMs up was the guiding
principle.

Thoughts ??

And as always - thank you ALL for your contributions to this community. I certainly have been a beneficiary.

Steve W
1973 23 Yellow
Southern California

 

[roy keen]

Don't think I would worry about that. You must be going around 65 or more at 3000 rpm with 370 gears.
--
Roy Keen
Minden,NV
76 X Glenbrook

 

[john phillips]

Roy,
My spreadsheet does not consider slip but, at 3000 RPM 3.7 diff 1st is 26,
2nd is 43, and 3rd is 64.5. Second Gear with a 3.07 and 3500 RPM should be
61 MPH and after you get over the hill 2500 RPM would be 65 MPH

I can see running half throttle uphill if you are not sure what your
temperatures are, but with the digi-panel + a tack and vacuum gauge, I
think you could be safe using most of the power a 455 can produce.

I want to add water temp in and out of the radiator as well as in and out
of the transmission oil cooler and fuel pressure.

Steve,
How do you feel about the switch torque converter? Is it kind of like
dropping into second gear when the pedal is to the metal or is it more
touque as RPM decrese? Is it a way to simulate more gears in the
transmission?

> Don't think I would worry about that. You must be going around 65 or more
> at 3000 rpm with 370 gears.
> --
> Roy Keen
> Minden,NV
> 76 X Glenbrook
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>

--

*John Phillips*

 

[johnny]

I mounted the digipanel out of sight on my 23', and will on the 26'. What I want is the alarm from it. I have reasonable accurate gauges for exacts
which I can see.
I'm hoping the new engine will show me the 3.7 is worthwhile - it certainly added nothing but noise and ROM to the last motor. Which was basically
junque. In roughly three years I found zero benefit from the antispin setup in it... it just spun both wheels instead of only one in the loose stuff.
We will see.

--johnny
--
Foolish Carriage, 76 26' Eleganza(?) with beaucoup mods and add - ons.
Braselton, Ga.
"I forgive them all, save those who hurt the dogs. They must answer to me in hell" - ol Andy, paraphrased

 

[Matt Colie]

> Bob -
> You've got me curious / worried about this: "NEVER use more then half throttle. NEVER. And except the speed you get."
> I've got a 23 footer weighing in at 11K or so - with a 455 and a 3.70 Limited Slip final drive. Manny tranny. Patterson carb and HEI
> distributor.
> I've traveled up hills - pedal to the floor (kick down switch disabled) - in high gear and at 3000 RPM or so - and LOW vacuum. Coach seemed to
> work just fine. No excessive temperature rise (trans and water) and no noticeable ill effects...
> Sounds like I ought not do this... Shift to second gear and keep vacuum up ?? I had been led to believe that keeping RPMs up was the guiding
> principle.
> Thoughts ??
> And as always - thank you ALL for your contributions to this community. I certainly have been a beneficiary.
> Steve W
> 1973 23 Yellow
> Southern California

Steve,

Three abbreviations we have to know now...
BMEP Brake Mean Effective Pressure - How hard the combustion is pushing in the pistons.
(P)ICP (Pre) Ignition Cylinder Pressure - what the cylinder pressure it just before the spark plug (tries to) fire.
WOT Wide Open Throttle - Do I need to explain this one?

There are three different problems we are fighting.

The deadliest of these is lugging. That is when you are running with low crankshaft speed and high BMEP. This has a tendency to pound on pistons and
bearings. The bearing are often below the surface speed that they need to build the hydraulic wedge that is how they support the loads that they will
encounter. At 3000 you are well above lugging.

The next is the one that kills the GM HEI systems. The is the well known problem that it is harder to start the fire at higher ICP. This is simply
because there are more molecules in the way. This should ring a bell to anybody that has has ignition failures at high loads. The higher voltage
that can accumulate is what takes out the coils and modules of HEI.

A third issue you seem to be handling is that the heat rejection from the driveline while running at high loads is very often an issue that is a
serious issue. Lots of people that have street grade passcar that believe that they could maintain a high speed find this out the hard way. Many of
the old muscle cars could be destroyed in a single extended high speed run.

That is why Bob would not want to run a coach motor at more than half throttle. I will bet that he does not limit his Corvair to half throttle, but
racers tend to not stay at WOT for very long because the track is not straight.

Now, to your specific case, you can run at WOT-3K for the time it takes even to climb a serious mountain without doing any harm. These engines will
take that and more. The real limiter becomes the carburetor flow. Be aware that the Rochester you are running has a power enrichment system to keep
the cylinder temperatures down at high manifold pressures (low vacuum) that you can have at/near WOT. As soon as that power enrichment is active, you
are close to "flushing" the carburetor. While it is hard to have good fuel economy when climbing, having the power circuit on will guarantee that you
burn more fuel. I did so projects with aircraft engine people, and they often referred to passcar engines as "gasoline cooled".

Matt
--
Matt & Mary Colie - '73 Glacier 23 - Members GMCMI, GMCGL, GMCES
Electronically Controlled Quiet Engine Cooling Fan
OE Rear Drum Brakes with Applied Control Arms
SE Michigan - Twixt A2 and Detroit

 

[Bob Dunahugh]

I've never had my 403 at the wide open throttle position except for passing=
. And that's on 2 lane roads only. I shift down to a lower gear ratio. I'll=
run the RPMs up to just under 5000 if needed. So that I don't go to wide =
open. My half throttle, and seldom 3/4 at most rule. Is to keep the combust=
ion chamber pressures/temps lower, exhaust valve temps lower, bearing loads=
down, and thus my over all engine temps lowered in the prosses. The next =
benefit is that my trans temp/load is reduced. The trans that's in the GMC =
we drive now. Was in the burned GMC. I rebuilt that trans myself in 2003. P=
lus that trans never is on the road without a 17000, to 24000 lbs GVW. I've=
never had any engine problems except for the water pump shaft that twisted=
off a year ago. I don't know of any GMC that pulls the loads that ours's =
does. That 3:70 FD has a lot to do with it. And I do it with the heaviest =
coach. Then the smallest engine. Something to think about the next time th=
at you don't want to run the RPM's up. Bob Dunahugh _________________=
_______________ From: Bob Dunahugh Sent: Sunday, January 27, 2019 11:26=
AM To: gmclist Subject: Tid Bit. Getting to the top of=
the mountain. And not over load the engine or transmission. Think of=
it this way. You have a 10 speed bike. You shift to a lower ratio. So that=
it takes less effort for you. The bikes engine. To get down the road. Or =
up that hill. Thus you. The bikes engine will run cooler. And not be so ti=
red at the top of the hill. The 3:70 FD is an outstanding improvement to an=
y GMC. Towing or not. Mileage goes up because your running a higher intake =
vacuum. Less load on pistons/bearings. And the water pump is getting more=
water to the radiator. The same situation for the transmission. Runs coole=
r with less load. More fluid to the trans cooler. If your running a power d=
rive chain in the transmission. The trans will not get the less load/heat =
reductions that the 3:70 FD offers. And finally as to transmission loading =
on steep climbs. NEVER use more then half throttle. NEVER. And except the s=
peed you get. There is a very old thought that running an engine =
at higher RPM's is hard on your engine. That idea died in the mid 50's. W=
hen compression ratio's went up. Piston technology made great strides. Alum=
inum pistons were replacing the heavy cast iron ones of the day. Engine l=
ubrication system were greatly improved. Pulling a heavy load like are GMC'=
s at low RPM's. Puts more load on the engine pistons, and bearings. Reduc=
e the load/heat on your engine, and trans. Don't be overly concerned about=
running the RPM's to the 4000, to 4500 point. I've been in the mountains=
with a GVW of 17,000 lbs. That's the weight on one and a half GMC's. Using=
a perfectly stock 403. No headers, no 3 inch exhaust, and no extras engine=
venting. Bob Dunahugh

 

[jim kanomata1]

There is plenty oil in the pan , so unless run in mid 5,000rpm, your fine,
your read too many hot rod mags.

On Wed, Jan 30, 2019 at 6:35 AM Johnny Bridges via Gmclist <

> I mounted the digipanel out of sight on my 23', and will on the 26'. What
> I want is the alarm from it. I have reasonable accurate gauges for exacts
> which I can see.
> I'm hoping the new engine will show me the 3.7 is worthwhile - it
> certainly added nothing but noise and ROM to the last motor. Which was
> basically
> junque. In roughly three years I found zero benefit from the antispin
> setup in it... it just spun both wheels instead of only one in the loose
> stuff.
> We will see.
>
> --johnny
> --
> Foolish Carriage, 76 26' Eleganza(?) with beaucoup mods and add - ons.
> Braselton, Ga.
> "I forgive them all, save those who hurt the dogs. They must answer to me
> in hell" - ol Andy, paraphrased
>
>
> _______________________________________________
> 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.appliedgmc.com
1-800-752-7502

 

[john phillips]

Jim
Any comment about switch pitch converter?

> There is plenty oil in the pan , so unless run in mid 5,000rpm, your fine,
> your read too many hot rod mags.
>
> On Wed, Jan 30, 2019 at 6:35 AM Johnny Bridges via Gmclist <

>
> > I mounted the digipanel out of sight on my 23', and will on the 26'.
> What
> > I want is the alarm from it. I have reasonable accurate gauges for
> exacts
> > which I can see.
> > I'm hoping the new engine will show me the 3.7 is worthwhile - it
> > certainly added nothing but noise and ROM to the last motor. Which was
> > basically
> > junque. In roughly three years I found zero benefit from the antispin
> > setup in it... it just spun both wheels instead of only one in the loose
> > stuff.
> > We will see.
> >
> > --johnny
> > --
> > Foolish Carriage, 76 26' Eleganza(?) with beaucoup mods and add - ons.
> > Braselton, Ga.
> > "I forgive them all, save those who hurt the dogs. They must answer to
> me
> > in hell" - ol Andy, paraphrased
> >
> >
> > _______________________________________________
> > 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.appliedgmc.com
> 1-800-752-7502
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>

--

*John Phillips*

 

[Jim Hupy]

Only experience I have them was with the switch pitch Buicks. Never dealt
with one in a GMC. Manny Trevao is your switch pitch go to guy. I have a
some experience with over n under transfer cases and 2 speed rear ends and
manual shift overdrive transmissions. On hills, they all have some good
points if you are a good shift jockey.
Jim Hupy

> Jim
> Any comment about switch pitch converter?
>
> On Wed, Jan 30, 2019 at 9:36 PM Jim Kanomata

>
> > There is plenty oil in the pan , so unless run in mid 5,000rpm, your
> fine,
> > your read too many hot rod mags.
> >
> > On Wed, Jan 30, 2019 at 6:35 AM Johnny Bridges via Gmclist <

> >
> > > I mounted the digipanel out of sight on my 23', and will on the 26'.
> > What
> > > I want is the alarm from it. I have reasonable accurate gauges for
> > exacts
> > > which I can see.
> > > I'm hoping the new engine will show me the 3.7 is worthwhile - it
> > > certainly added nothing but noise and ROM to the last motor. Which was
> > > basically
> > > junque. In roughly three years I found zero benefit from the antispin
> > > setup in it... it just spun both wheels instead of only one in the
> loose
> > > stuff.
> > > We will see.
> > >
> > > --johnny
> > > --
> > > Foolish Carriage, 76 26' Eleganza(?) with beaucoup mods and add - ons.
> > > Braselton, Ga.
> > > "I forgive them all, save those who hurt the dogs. They must answer to
> > me
> > > in hell" - ol Andy, paraphrased
> > >
> > >
> > > _______________________________________________
> > > 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.appliedgmc.com
> > 1-800-752-7502
> > _______________________________________________
> > GMCnet mailing list
> > Unsubscribe or Change List Options:
> > http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
> >
>
>
> --
>
> *John Phillips*
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>

 

[Nelson W]

Not Jim,
But here is my experience with the switch pitch tranny in one of my GMC mh. it worked great for short periods of engagement, like passing on two lane roads or pulling the mh over a curb. After installing a temp gauge on the tranny fluid i noted that the temp would rise drastically when the switch pitch kicked in, so I then installed a lockout electrical switch to control the engagement. Using the switch pitch on a long uphill pull would overheat the ATF big time. I should also note that the Switch pitch came with a 3.21 FD that worked well as it seem to have somewhat of a limited slip capability .
HTH
Nelson Wright
Belle Isle Fl.
78 Rear Bath Royal

> Jim
> Any comment about switch pitch converter?
>

>
>> There is plenty oil in the pan , so unless run in mid 5,000rpm, your fine,
>> your read too many hot rod mags.
>>
>> On Wed, Jan 30, 2019 at 6:35 AM Johnny Bridges via Gmclist <

>>
>>> I mounted the digipanel out of sight on my 23', and will on the 26'.
>> What
>>> I want is the alarm from it. I have reasonable accurate gauges for
>> exacts
>>> which I can see.
>>> I'm hoping the new engine will show me the 3.7 is worthwhile - it
>>> certainly added nothing but noise and ROM to the last motor. Which was
>>> basically
>>> junque. In roughly three years I found zero benefit from the antispin
>>> setup in it... it just spun both wheels instead of only one in the loose
>>> stuff.
>>> We will see.
>>>
>>> --johnny
>>> --
>>> Foolish Carriage, 76 26' Eleganza(?) with beaucoup mods and add - ons.
>>> Braselton, Ga.
>>> "I forgive them all, save those who hurt the dogs. They must answer to
>> me
>>> in hell" - ol Andy, paraphrased
>>>
>>>
>>> _______________________________________________
>>> 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.appliedgmc.com
>> 1-800-752-7502
>> _______________________________________________
>> GMCnet mailing list
>> Unsubscribe or Change List Options:
>> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>>
>
>
> --
>
> *John Phillips*
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org

 

[john r. lebetski]

Switch pitch was to launch the big heavy cars and act as a passing gear, short term only. These cars, such as a 1967 Electra 430-4 had a 2.78 rear so
needed the extra torque multiplication, then have almost an
Overdrive equivalent with the 2.78 rear, low stall and in 3rd in the TH400. It might work on a GMC off the line or passing, but personally I think
using converter multiplication to pull a long grade is a bad way to do it. Dexron temps will climb faster than the coach will.

--
John Lebetski
Woodstock, IL
77 Eleganza II

 

[john phillips]

The first vehicle I ever drove by my self was a 48 dodge truck five-speed
with a 2-speed axle and 26000 written on the door. Dad showed me how to
start it in low gear and let it idle from the field to park it in front of
the grain bins about 1/2 mile away. Grandma about had a cow when she saw me
get out of the truck. I was about five at the time. Later I drove an
International Harvester tractor with a torque amplifier. I hoped the switch
pitch would simulate the function of the 2-speed axle or the TA. It seems
like it kind of does for short periods but cannot be used for hill
climbing.

> Not Jim,
> But here is my experience with the switch pitch tranny in one of my GMC
> mh. it worked great for short periods of engagement, like passing on two
> lane roads or pulling the mh over a curb. After installing a temp gauge on
> the tranny fluid i noted that the temp would rise drastically when the
> switch pitch kicked in, so I then installed a lockout electrical switch to
> control the engagement. Using the switch pitch on a long uphill pull would
> overheat the ATF big time. I should also note that the Switch pitch came
> with a 3.21 FD that worked well as it seem to have somewhat of a limited
> slip capability .
> HTH
> Nelson Wright
> Belle Isle Fl.
> 78 Rear Bath Royal
>

>
> > Jim
> > Any comment about switch pitch converter?
> >
> > On Wed, Jan 30, 2019 at 9:36 PM Jim Kanomata

> >
> >> There is plenty oil in the pan , so unless run in mid 5,000rpm, your
> fine,
> >> your read too many hot rod mags.
> >>
> >> On Wed, Jan 30, 2019 at 6:35 AM Johnny Bridges via Gmclist <

> >>
> >>> I mounted the digipanel out of sight on my 23', and will on the 26'.
> >> What
> >>> I want is the alarm from it. I have reasonable accurate gauges for
> >> exacts
> >>> which I can see.
> >>> I'm hoping the new engine will show me the 3.7 is worthwhile - it
> >>> certainly added nothing but noise and ROM to the last motor. Which was
> >>> basically
> >>> junque. In roughly three years I found zero benefit from the antispin
> >>> setup in it... it just spun both wheels instead of only one in the
> loose
> >>> stuff.
> >>> We will see.
> >>>
> >>> --johnny
> >>> --
> >>> Foolish Carriage, 76 26' Eleganza(?) with beaucoup mods and add - ons.
> >>> Braselton, Ga.
> >>> "I forgive them all, save those who hurt the dogs. They must answer to
> >> me
> >>> in hell" - ol Andy, paraphrased
> >>>
> >>>
> >>> _______________________________________________
> >>> 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.appliedgmc.com
> >> 1-800-752-7502
> >> _______________________________________________
> >> GMCnet mailing list
> >> Unsubscribe or Change List Options:
> >> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
> >>
> >
> >
> > --
> >
> > *John Phillips*
> > _______________________________________________
> > 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
>

--

*John Phillips*

 

[Ken H.]

IIRC, Manny approves of 'most any ATF (we put WalMart's house brand in the
ones he built here) -- UNLESS it's switch pitch, then he recommends Mobil
1. To me, that says something about the effects of temperature in the SP.

Ken H.

On Thu, Jan 31, 2019 at 12:55 PM John Phillips
wrote:

> Jim
> Any comment about switch pitch converter?
>
> On Wed, Jan 30, 2019 at 9:36 PM Jim Kanomata

>
> > There is plenty oil in the pan , so unless run in mid 5,000rpm, your
> fine,
> > your read too many hot rod mags.
> >
> > On Wed, Jan 30, 2019 at 6:35 AM Johnny Bridges via Gmclist <

> >
> > > I mounted the digipanel out of sight on my 23', and will on the 26'.
> > What
> > > I want is the alarm from it. I have reasonable accurate gauges for
> > exacts
> > > which I can see.
> > > I'm hoping the new engine will show me the 3.7 is worthwhile - it
> > > certainly added nothing but noise and ROM to the last motor. Which was
> > > basically
> > > junque. In roughly three years I found zero benefit from the antispin
> > > setup in it... it just spun both wheels instead of only one in the
> loose
> > > stuff.
> > > We will see.
> > >
> > > --johnny
> > > --
> > > Foolish Carriage, 76 26' Eleganza(?) with beaucoup mods and add - ons.
> > > Braselton, Ga.
> > > "I forgive them all, save those who hurt the dogs. They must answer to
> > me
> > > in hell" - ol Andy, paraphrased
> > >
> > >
> > > _______________________________________________
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> > >
> > --
> > Jim Kanomata
> > Applied/GMC, Newark,CA
> > jimk
> > http://www.appliedgmc.com
> > 1-800-752-7502
> > _______________________________________________
> > GMCnet mailing list
> > Unsubscribe or Change List Options:
> > http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
> >
>
>
> --
>
> *John Phillips*
> _______________________________________________
> GMCnet mailing list
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>

 

[LarryW]

I have had a switch pitch in my coach since I started driving it in 2005. Have used the SP infrequently...mostly accelerating from stop light or
accelerating on ramps. But have also used it in reverse backing up steep driveways. Pretty handy for that. Knowing what I know now, I'd probably go
for the SP again. Even though I don't use it very much, it is nice to have that option. JWIT
--
Larry
78 Royale w/500 Caddy
Menomonie, WI.