GM Service Manual Online
For 1990-2009 cars only

Tools Required

J 21426 Rear Extension Seal Installer

Removal Procedure

  1. Raise the vehicle. Refer to Lifting and Jacking the Vehicle .
  2. Remove the propeller shaft. Refer to One-Piece Propeller Shaft Replacement or to Two-Piece Propeller Shaft Replacement in Propeller Shaft.

  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 using J 21426 .
  2. Install the propeller shaft. Refer to One-Piece Propeller Shaft Replacement or to Two-Piece Propeller Shaft Replacement in Propeller Shaft.
  3. Lower the vehicle.
  4. Check the transmission fluid level. Refer to Fluid Capacity .
  5. Use Dexron® III Automatic Transmission Fluid.