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New Tsb?

bgrif005

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bgrif005 Enthusiast

bgrif005

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I have my truck at the dealership for a few things...one of which is the common problem of the nudge foward after coming to a complete stop. This is the second time its been there for this.

 

now my service manager says there is a new TSB for the driveshaft needing a different grease in it or something. it sounds like the slip yoke problem from the past, but the GMT 900s dont have the same ol slip yoke or non at all (i think it is a different mechanism performing the same task with a new name).

 

has anyone heard of this TSB? Can someone get the text for it?

asilverblazer Senior Enthusiast

asilverblazer

Posted
Posted

Sounds to me like they are trying to fix a different problem than what you are describing. You seem to be describing the delayed shift back to first, causing a slight 'surge', 'nudge', 'bump' forward that is FELT more. The thing it sounds like they are trying to fix is the 'sqwuak', 'lurch' type SOUND when driveshaft moves on the yoke of the transmission or transfer case.

gvbhunt Enthusiast

gvbhunt

Posted
Posted
Sounds to me like they are trying to fix a different problem than what you are describing. You seem to be describing the delayed shift back to first, causing a slight 'surge', 'nudge', 'bump' forward that is FELT more.

Dang, that is what that is. I keep thinking there is some sort of troll that lives under the tailgate that is jacking with me...

bgrif005 Enthusiast

bgrif005

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well got my truck back. it did the nudge once since i got it back. not sure if the new grease just didnt work or if it has to work it self around the yoke. i know how it is when a grease has to work itself in and around to work properly. i used to have greasable shackles on my toyota tacoma...i had to grease them once a month to keep them for squeeking like a b**ch - it would take 2 or 3 days before the grease would work itself around and silence the squeeking.

 

so what im saying is i will give it somemore time to see if the fix works. however, the paper work they handed back to me has some odd wording on it about this fix: "slip yoke binding on output shaft. NEC to diagnose and lube slip yoke as perpip020B. Temperary fix. Update coming." what is all this about temperary fix and update coming???

 

also, i think this is the slip yoke thing and not the tranny. when i felt it last night it just really didnt feel like a downshift, but more like a release.

7LitreC5 Enthusiast

7LitreC5

Posted
Posted

I''l be darned. So that what causes that. My 08 does that once in a while.

 

Sounds to me like they are trying to fix a different problem than what you are describing. You seem to be describing the delayed shift back to first, causing a slight 'surge', 'nudge', 'bump' forward that is FELT more.
LAGA Enthusiast

LAGA

Posted
Posted

Mine only does it when the truck is cold. Once it is driven 5-10 miles I don`t seem to notice it. How about you guys?

rvsahs Senior Enthusiast

rvsahs

Posted
Posted

My '08 Sierra does that sometimes after a hard stop. I've adjusted my driving habits such that I usually ease up to a stop light/sign. My wife experiences the "slight surge, nudge, bump forward" as she is just an occasional driver and she drives pretty hard between lights. She asked me about it the other day and I pointed her in the direction of these posts on the subject. My previous '95 Dodge 1500 never did this in over 70k miles, but it had other Mopar issues. Otherwise, I love this truck.

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