GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2004 🢒 Avalanche - 4WD 🢒 Driveline/Axle 🢒 Rear Drive Axle 🢒 Rear Axle Shaft Seal Replacement - Inner

Tools Required
    • J 33049 Camshaft Bearing Service Set
    • J 45177 Differential Seal Installer - Inner

Removal Procedure
  1. Raise the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
  2. Remove the tire and wheel assembly. Refer to Tire and Wheel Removal and Installation in Tires and Wheels.
  3. Remove the axle shafts. Refer to Rear Axle Shaft Replacement .
  4. Remove the differential assembly. Refer to Differential Replacement .

    5. Object Number: 820545 Size: SH
  5. Install the smallest expanding driver (3) and the small driving washer (1) onto the expander assembly (2).

    6. Object Number: 820542 Size: SH
  6. Align the separation lines between the expanding driver and the expander assembly.

    7. Object Number: 820546 Size: SH
  7. Assemble the expander assembly (2) onto the driver bar extension (1).
  8. Assemble the drive bar extension onto the driver bar.

    9. Object Number: 820541 Size: SH
  9. Insert the J 33049 into the axle tube and through the axle shaft seal.
  10. While holding the expander assembly nut, turn the driving bar clockwise until the expanding driver is snug against the axle shaft seal.
  11. Drive out the seal using the J 33049 and a hammer.

Installation Procedure
  1. Assemble the drive bar extension onto the drive bar of J 33049 .
  2. Insert the J 33049 into the opposite side axle shaft tube.
  3. Install the J 45177 onto the J 33049 .

    4. Object Number: 820550 Size: SH
  4. Insert the axle shaft seal into the axle tube.

    5. Object Number: 815639 Size: SH
  5. Install the J 45177  (1) and the J 33049  (2) over the axle shaft seal.
  6. Drive the axle shaft seal into the axle tube using the J 45177 , the J 33049 and a hammer.
  7. Install the differential assembly. Refer to Differential Replacement .
  8. Install the axle shafts. Refer to Rear Axle Shaft Replacement .
  9. Install the tire and wheel assembly. Refer to Tire and Wheel Removal and Installation in Tires and Wheels.
  10. Lower the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.