Differential Assembly: Service and Repair

Differential Clutch Pump Check Valve Replacement

Removal Procedure





1. Drain the differential lubricant.
2. Disconnect the clutch pump check valve electrical connector.
3. Remove the clutch pump check valve mounting bolts (4, 5).
4. Remove the clutch pump check valve (3) by carefully pulling straight out of the differential carrier.
5. Remove the O-ring seals (1, 2) from the valve. The O-ring seals may be reused if not cut or damaged.

Installation Procedure





Important: Inspect the clutch pump check valve O-ring seals in order to ensure they are not cut or damaged. Replace cut or damaged O-ring seals with new seals.

1. Lubricate the O-ring seals (1, 2) with synthetic gear oil GM P/N 12378514 (Canadian P/N 88901045) or equivalent.
2. Install the O-ring seals to the valve.
3. Install the clutch pump check valve to the differential carrier by carefully pushing the valve straight in until fully seated.

Notice: Refer to Fastener Notice in Service Precautions.

4. Install the clutch pump check valve mounting bolts (4, 5).
^ Tighten the bolts to 10 Nm (89 inch lbs.).
5. Connect the clutch pump check valve electrical connector.
6. Fill the rear differential lubricant.