Jerking on start and stop

[pgandr]

My truck has two jerks on start and stop feels like rear end twisting or the dirveshaft has alot of slack. Dealership says they can't find anything wrong. LOL. Anyone else with this problem or idea of how to fix? Problem seems to be getting worse/or more aggravating. Running 2004 2500hd 2wd LWB Duramax. Problem started at about 34,000 miles and I now have about 46,000 on her.

[FJ40INTOW]

Try lubing the splines on the driveshaft.
15 minute job. GM calls for a parifin based grease part# 123456789
I bought mine from the stealer but it can be purchased a lot cheaper from other vendors.

[TSimpler]

Is there a trick or do you just remove the "U"joint clamp and pull it out.

I am having the same problem.

Thanks
Trent

[FJ40INTOW]

Mark location of spline and remove u-bolt clamps.



Edited:
FJ40INTOW
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[DA BIG ONE]

If it is a automatic check for torque converter shudder when locked maybe line pressure is not stable........