GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2005 🢒 Uplander - 4WD 🢒 Driveline/Axle 🢒 Drive Axle - Locking/Limited Slip 🢒 Differential Clutch Pump Check Valve Replacement

Removal Procedure

    Object Number: 630684 Size: SH
  1. Drain the differential lubricant. Refer to Lubricant Change in Rear Drive Axle.
  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

    Object Number: 630684 Size: SH

    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. Notice: Refer to Fastener Notice in the Preface section.

  3. Install the clutch pump check valve to the differential carrier by carefully pushing the valve straight in until fully seated.
  4. Install the clutch pump check valve mounting bolts (4, 5).

    5. Tighten
    Tighten the bolts to 10 N·m (89 lb in).

  5. Connect the clutch pump check valve electrical connector.
  6. Fill the rear differential lubricant. Refer to Lubricant Change in Rear Drive Axle.