GM Service Manual Online
For 1990-2009 cars only

Cause

Correction

DEFINITION: A noise is present only when the vehicle turns.

Important: 

   • Inspect for the proper gear oil levels prior to performing system diagnosis. Refer to Rear Axle Lubricant Level Inspection .
   • Operate the vehicle turning in tight circles in both left and right directions. A chatter type concern may indicate an incorrect type gear oil, lack of the friction modifier additive, or worn friction discs and/or plates.

Worn or loose rear axle mount and/or bracket

Repair or replace, as required.

Worn axle shaft constant velocity joints

Replace the constant velocity joints, as required.

Worn wheel bearings

Replace the wheel bearings, as required.

Incorrect gear oil

Drain and fill to the proper level with the correct gear oil and friction modifier additive. Adding friction modifier to the existing fluid without draining, will not correct this condition. Refer to Adhesives, Fluids, Lubricants, and Sealers and Rear Axle Lubricant Replacement .

Worn clutch plates

Replace the friction discs and plates, as required.