GM Service Manual Online
For 1990-2009 cars only

Locking Rear Drive Axle Chatters in Turns for Chevrolet Chevy Suburban - 4WD 2008

Checks

Action

Lubricant is contaminated

Drain and flush the axle housing thoroughly. Refill with the correct lubricant. Refer to Rear Axle Lubricant Replacement.

The clutch plates are deteriorated

Replace the clutch plates. Refer to Locking Differential Cam Unit Disassemble and Locking Differential Cam Unit Assemble.