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Home >> Chevrolet >> 2020 >> Express 2500 LS, 6.0L Eng VIN G >> Repair and Diagnosis >> External Pages >> Different car >> Section 45 (Rear Drive Axle) >> Diagnostic Information and Procedures >> Locking Rear Axle Does Not Lock

Locking Rear Axle Does Not Lock

WARNING: This page is about a different car, the 2019 GMC Savana 3500, 2019 GMC Savana 2500, 2019 Chevrolet Express 3500, and 2019 Chevrolet Express 2500. However, it is still accessible from the selected car via links, so may be relevant.
Checks Action
Little or no preload on the latching bracket Replace the governor assembly and the latching bracket. Locking Differential Disassemble (10.5 Inch Axle) , or Locking Differential Disassemble (9.5 Inch Axle) , Locking Differential Assemble (9.5 Inch Axle) , or Locking Differential Assemble (10.5 Inch Axle) 
Flyweights in the governor assembly are stuck closed Replace the governor assembly and the latching bracket. Locking Differential Disassemble (10.5 Inch Axle) , or Locking Differential Disassemble (9.5 Inch Axle) , Locking Differential Assemble (9.5 Inch Axle) , or Locking Differential Assemble (10.5 Inch Axle) 
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:
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