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 in Transfer Case - NVG 226-NP8 Unit Repair.