GM Service Manual Online
For 1990-2009 cars only

Cause

Correction

DEFINITION: When in the AWD mode, a shudder is felt during acceleration or a crow-hop or binding while turning, which may cause tire scuffing.

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

Incorrect transfer case fluid

Flush the transfer case and fill with the correct fluid. The active transfer case uses a blue fluid. Refer to Transfer Case Fluid Replacement .

Burrs on the clutch hub slots

Deburr the hub slots. If the hub slots are excessively worn, replace the clutch hub. Refer to Transfer Case Cleaning and Inspection.