GM Service Manual Online
For 1990-2009 cars only

Checks

Action

Little or no preload on the latching bracket

Replace the governor assembly and the latching bracket. Refer to Locking Differential Disassemble and Locking Differential Assemble .

Flyweights in the governor assembly are stuck closed

Replace the governor assembly and the latching bracket. Refer to Locking Differential Disassemble and Locking Differential Assemble .

The drive teeth on the governor or cam gear assembly are broken

Replace the cam plate, the governor assembly, and the latching bracket. Refer to the following:

Broken clutch plates

Replace the clutch plates and the wave spring. Refer to the following: