Putting transmission into park doesn't hold the coach

P

peer oliver schmidt

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Feb 10, 2014
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Mark and I noticed this. Any easy fix for this? This was in his parking
lot (not steep at all).
--
Best regards

Peer Oliver Schmidt
PGP Key ID: 0x83E1C2EA

'76a Eleganza II, VA
 
Sheared parking pawl. About the last thing that comes out of the case.
Inexpensive part, but costly to repair. There is a remote possibility that
the shift cable is not adjusted correctly, but, that is usually just
wishful thinking. Your experience may vary. For the final EXPERT answer,
consult with Manny T.
Jim Hupy
Salem, Or
78 GMC ROYALE 403

On Apr 11, 2017 12:30 PM, "Peer Oliver Schmidt GMC"
wrote:

Mark and I noticed this. Any easy fix for this? This was in his parking
lot (not steep at all).
--
Best regards

Peer Oliver Schmidt
PGP Key ID: 0x83E1C2EA

'76a Eleganza II, VA

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Probably just the shift lever out of adjustment. Scotch the coach, put lever in park. On the transmission shifter rod going to transmission lever
loosen the adjuster bolt then push the transmission lever all the way in park. Tighten bolt.

> Mark and I noticed this. Any easy fix for this? This was in his parking
> lot (not steep at all).
> --
> Best regards
>
> Peer Oliver Schmidt
> PGP Key ID: 0x83E1C2EA
>
> '76a Eleganza II, VA
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org

--
C. Boyd
76 Crestmont
East Tennessee
 
> Mark and I noticed this. Any easy fix for this? This was in his parking lot (not steep at all).
> --
> Best regards
> Peer Oliver Schmidt
> '76a Eleganza II, VA
I wasn't too concerned. I thought it was your technique. You weren't treating it like a 40 year old Detroit automatic. You gotta slam that sucker into
park.

Next time I drive it around the block I'll verify that. For now, I'm just leaving it chocked.
--
73 23' Sequoia 4 Sale
73 23' CanyonLands Parts Unit 4 Sale
Upper Alabama
"When I grow up I am going to be a curmudgeon."
 
Mark,
> For now, I'm just leaving it chocked.

I try that every now and then on my kids... Somehow, it doesn't help
with them :D

Let's hope it was my stupidity and not anything major!

--
Best regards

Peer Oliver Schmidt
PGP Key ID: 0x83E1C2EA

'76a Eleganza II, VA
 
> I have this same problem, could it be the parking pawl not engaging the drum correctly?
Could be the shift cable needs adjusting. Or it might be a real expensive job.

On mine, I'll see if I can get it to hold by shifting into park the way I always have (pull the lever back and quickly and firmly push it into park).

If that fails, I will try adjusting the cable.

If that fails, I am leaning towards driving it into the lake.
--
73 23' Sequoia 4 Sale
73 23' CanyonLands Parts Unit 4 Sale
Upper Alabama
"When I grow up I am going to be a curmudgeon."
 
I'll bet if Y'All will follow Chuck's instructions, your parking pawl
problems will disappear. The lever should move easily into the P position
and the coach STAY PUT.

Ken H.

> > I have this same problem, could it be the parking pawl not engaging the
> drum correctly?
> Could be the shift cable needs adjusting. Or it might be a real expensive
> job.
>
> On mine, I'll see if I can get it to hold by shifting into park the way I
> always have (pull the lever back and quickly and firmly push it into park).
>
> If that fails, I will try adjusting the cable.
>
> If that fails, I am leaning towards driving it into the lake.
> --
> 73 23' Sequoia 4 Sale
> 73 23' CanyonLands Parts Unit 4 Sale
> Upper Alabama
> "When I grow up I am going to be a curmudgeon."
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
 
Chuck is right. Definitely an adjustment problem. There is NO WAY you should have to "slam that sucker into park". Follow Chuck's simple adjustment
procedure and you won't have any more problems putting it into park.
--
Carl Stouffer
'75 ex Palm Beach
Tucson, AZ.
Chuck Aulgur Reaction Arm Disc Brakes, Quadrabags, 3.70 LSD final drive, Lenzi knuckles/hubs, Dodge Truck 16" X 8" front wheels, Rear American Eagles,
Solar battery charging
 
That parking pawl inside the transmission has a severe case of the
"fragiles". If the coach is moving, even a little bit, and someone "slams
that sucker into park" you can full well expect to be "taking that sucker
apart, and replacing the parking pawl" Pays me now, or pays me later, your
choice. The TM 425 is a rugged, reliable transmission, but, it doesn't care
much for being "slammed" into gear.
Jim Hupy
Salem, Or
78 GMC ROYALE 403

> Chuck is right. Definitely an adjustment problem. There is NO WAY you
> should have to "slam that sucker into park". Follow Chuck's simple
> adjustment
> procedure and you won't have any more problems putting it into park.
> --
> Carl Stouffer
> '75 ex Palm Beach
> Tucson, AZ.
> Chuck Aulgur Reaction Arm Disc Brakes, Quadrabags, 3.70 LSD final drive,
> Lenzi knuckles/hubs, Dodge Truck 16" X 8" front wheels, Rear American
> Eagles,
> Solar battery charging
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
 
> That parking pawl inside the transmission has a severe case of the "fragiles". If the coach is moving, even a little bit, and someone "slams that
> sucker into park" you can full well expect to be "taking that sucker apart, and replacing the parking pawl" Pays me now, or pays me later, your
> choice. The TM 425 is a rugged, reliable transmission, but, it doesn't care much for being "slammed" into gear.
> Jim Hupy
> Salem, Or
> 78 GMC ROYALE 403
You folks are overreacting. Nobody said anything about rolling or even rocking. But it has to know you mean business, especially if it is a little
worn and getting close to needing re-adjusting.

FWIW, it was holding fine when I backed it out of the driveway, and it held in the parking lot where we Peer got behind the wheel (which had at least
as much slope as my driveway).

If the parking pawl is damaged, it is just one of those things that was bound to happen. He was in no way abusive when we parked. I thought he was
being TOO careful when he was moving the lever to P. So no harm, no foul.

Like I said, next time I drive it I will do what I have done with every American car of that era and see if it goes into Park. If it doesn't, I will
fiddle with the adjustment. If that doesn't work, it goes to sleep with the fishes.
--
73 23' Sequoia 4 Sale
73 23' CanyonLands Parts Unit 4 Sale
Upper Alabama
"When I grow up I am going to be a curmudgeon."
 
Mark,
> I thought he was being TOO careful when he was moving the lever to P. >

First time someone called me too sensitive :D

--
Best regards

Peer Oliver Schmidt
PGP Key ID: 0x83E1C2EA

'76a Eleganza II, VA
 
I wasn't being accusatory here. Plenty of opportunities abound in the last
40 years for previous owners to have done too many stupid things to blame
any of the current crew for much of anything. Just mentioned it for the
benefit of the new and next to be new crews out there.
Jim Hupy

On Apr 12, 2017 9:44 AM, "Peer Oliver Schmidt GMC"
wrote:

> Mark,
> > I thought he was being TOO careful when he was moving the lever to P. >
>
> First time someone called me too sensitive :D
>
> --
> Best regards
>
> Peer Oliver Schmidt
> PGP Key ID: 0x83E1C2EA
>
> '76a Eleganza II, VA
>
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
 
There is a rod that is attached to the lever on the trans. There is a
sliding barrel with bolt where you can slide it in the rod to adjust.
The bolt can loosen up a little and not allow the lever to be pulled enough
to ge into park.

> I wasn't being accusatory here. Plenty of opportunities abound in the last
> 40 years for previous owners to have done too many stupid things to blame
> any of the current crew for much of anything. Just mentioned it for the
> benefit of the new and next to be new crews out there.
> Jim Hupy
>
> On Apr 12, 2017 9:44 AM, "Peer Oliver Schmidt GMC"

>
> > Mark,
> > > I thought he was being TOO careful when he was moving the lever to P. >
> >
> > First time someone called me too sensitive :D
> >
> > --
> > Best regards
> >
> > Peer Oliver Schmidt
> > PGP Key ID: 0x83E1C2EA
> >
> > '76a Eleganza II, VA
> >
> >
> > _______________________________________________
> > 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, Fremont,CA
jimk
http://www.appliedgmc.com
1-800-752-7502
 
just a question, if the pawl is damaged is it hard to replace? on Ford trannies I've seen you can get at it from the pan and its pretty simple to
swap. ae GM trannies similar?
 
As always,what Chuck said is correct. However, it is possible to adjust the barrelslider/rod too far in the direction of PARK and lose the ability to
manually shift into LOW.
Depending on how worn and loose the internal part is, you may have to fiddle with it. Not a big deal- just have a little patience and adjust it so
both gears can be selected.
--
Gene Barrow
Lake Almanor, Ca.
1976 Palm Beach
 
Just a little extra info on the internals at play here - the manual lever does not engage the pawl directly, it spring loads the pawl to go into the
next available slot in the drum.
--
Wanting a GMC but must convince the wife first...
 
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