I've notice that some times while making slow turns the whole rear of my car kinda vibrates,would this be a differencial issue or something about the suspencion? I do know that there's a leak from the seal that always goes bad (betwen shatf an diff) but the clunk only happens during low speed turns.
thanks for any inputs.

 

Could be the Limited Slip going out.... Mine did the same thing, but mainly when backing up and turning slow at the same time..

93Z Will

 

Mine is having the same problem and its been getting worse. How much does this cost to repair?

 

If I were you guys I would change the rear-end lube and put some GM brand limited slip additive in it. Then see how it acts.

The additive is a friction modifier, and is supposed to let the clutchs in the carrier slip easier around corners, because thats when the rear-end unlocks. (You know, one wheel turns slower than the other).

Anyways, the clutches will last longer with the additive, so it's a good and cheap way of seeing if the carrier is going bad.