Locking Rear Axle Does Not Lock
WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2012 GMC Yukon XL, 2012 GMC Yukon, 2012 Chevrolet Tahoe, 2012 Chevrolet Suburban, and 2012 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.
Locking Rear Axle Does Not Lock
| Checks |
Action |
| Little or no preload on the latching bracket |
Replace the governor assembly and the latching bracket. Refer to Locking Differential Disassemble (8.6/9.5LD Inch Axles) , Locking Differential Disassemble (10.5 Inch Axle) , and Locking Differential Assemble (10.5 Inch Axle) , Locking Differential Assemble (8.6, 9.5LD Axles) . |
| Flyweights in the governor assembly are stuck closed |
Replace the governor assembly and the latching bracket. Refer to Locking Differential Disassemble (8.6/9.5LD Inch Axles) , Locking Differential Disassemble (10.5 Inch Axle) , and Locking Differential Assemble (10.5 Inch Axle) , Locking Differential Assemble (8.6, 9.5LD Axles) . |
| 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:
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| Broken clutch plates |
Replace the clutch plates and the wave spring. Refer to the following:
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