GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2009 🢒 Corvette 🢒 Driveline/Axle 🢒 Rear Drive Axle 🢒 Differential Cooler Adapter Nut Replacement

Removal Procedure
  1. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle.
  2. Lower and support the rear of the exhaust system.
  3. Install a drain pan under the vehicle.

    4. Object Number: 1491407 Size: SH
  4. Remove the differential cooler inlet pipe bolt (1).
  5. Using a bent tip screwdriver, remove the quick connect fitting retaining ring (3) from the quick connect fitting (4) and discard the retaining ring.
  6. Remove the differential cooler inlet pipe from the differential nut.

    7. Object Number: 1504799 Size: SH
  7. Disconnect the differential cooler pump inlet pipe from the differential. Refer to Differential Cooler Hose/Pipe Quick Connect Fitting.
  8. Remove the differential cooler adaptor nut from the differential.

Installation Procedure

    Caution: Refer to Fastener Caution in the Preface section.


    Object Number: 1504799 Size: SH

    Note: Inspect the differential cooler adaptor nut for signs of wear or damage. Replace the component if necessary. Replace the retaining clip when the adaptor nut is being reused.

  1. Install the differential cooler adaptor nut to the vehicle.

    2. Tighten
    Tighten the nut to 18 N·m (13 lb ft).

  2. Connect the differential cooler pump inlet pipe to the differential.

    3. A distinct snap should be heard or felt when assembling the cooler pipe to the fitting.

  3. To ensure the cooler line is properly installed, give the cooler pipe a gentle pull.

    4. Object Number: 1491407 Size: SH
  4. Install the differential cooler inlet pipe bolt (1).

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

  5. Fill the differential fluid. Refer to Rear Axle Lubricant Level Inspection.
  6. Raise and secure the rear of the exhaust system.
  7. Remove the drain pan from under the vehicle.
  8. Lower the vehicle. Refer to Lifting and Jacking the Vehicle.