GM Service Manual Online
For 1990-2009 cars only

Cause

Correction

DEFINITION: A shudder felt during acceleration, or a crop-hop while turning.

Review the Symptoms - Transfer Case and perform the necessary inspections.

Rear differential

If equipped with a G80 axle, flush and fill with the correct fluid. Refer to Locking Rear Drive Axle Chatters in Turns in Rear Drive Axle - Locking/Limited Slip Rear Axle.