2003 Duramax Diesel clunk

[Joe H]

I get a drive line clunk at operating tempatures when starting and stopping. Noticed mostly at take-off. Does anyone out there have a fix? I would appreciate any advice on the matter.

[Jim Brzozowski]

Check the u-joints on the driveshaft for wear.

[Timberwolf]

Could be u-joints, or something else. Where is the clunk coming from? ie. front, back, left, right, etc.

[DmaxMaverick]

It is very likely your output spline is in need of some grease. When you stop, spring wind-up occurs in the leafs. When you take off, the spline sticks, then releases in a "clunk", as the springs swing to the other extreme. GM's "fix" for this is to grease the spline with a HP lithium grease.


I'm moving this topic to the Drivetrain Forum.

[ 07-29-2005, 06:34 PM: Message edited by: DmaxMaverick ]