GM Service Manual Online
For 1990-2009 cars only

Tools Required:

J 21426 Extension Housing Seal Installer

Removal Procedure

  1. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
  2. Remove the propeller shaft. Refer to One-Piece Propeller Shaft Replacement in Driveline/Axle.

  3. Object Number: 408509  Size: SH
  4. Remove the rear extension oil seal.

Installation Procedure


    Object Number: 408511  Size: SH
  1. Install the new seal usingJ 21426 .
  2. Install the propeller shaft. Refer to One-Piece Propeller Shaft Replacement in Driveline/Axle.
  3. Lower the vehicle.
  4. Fill the transmission to the proper level with DEXTRON III Transmission Fluid. Refer to Transmission Fluid Check .