GM Service Manual Online
For 1990-2009 cars only

Checks

Action

The lubricant is contaminated.

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

The clutch plates are deteriorated.

Replace the clutch plates. Refer to the following:

  1. Locking Differential Disassemble
  2. Locking Differential Clutch Disc Assembly Disassemble
  3. Locking Differential Cam Unit Disassemble
  4. Locking Differential Cam Unit Assemble
  5. Locking Differential Assemble