GM Service Manual Online
For 1990-2009 cars only

Special Tools

    • DT-48021 Seal Installer
    • DT-48734 Extension Housing Bushing Replacer
    • J 37668-A Output Shaft Seal Installer
    • J 45380 Transfer Case Rear Bushing Remover and Installer

Removal Procedure


    Object Number: 715670  Size: SH
  1. Raise and suitably support the vehicle. Refer to Lifting and Jacking the Vehicle .
  2. Remove the transfer case shield. Refer to Transfer Case Shield Replacement .
  3. Remove the rear propeller shaft.
  4. • For vehicles equipped with the one piece propeller shaft, refer to One-Piece Propeller Shaft Replacement .
    • For vehicles equipped with the two piece propeller shaft, refer to Two-Piece Propeller Shaft Replacement .
  5. Remove the transfer case rear output shaft seal.

  6. Object Number: 801274  Size: SH
  7. Inspect the rear output shaft bushing for scoring or wear.
  8. Remove the rear output shaft bushing if required .
  9. For the light duty transfer case use J 45380 , for the heavy duty transfer case use DT-48734 .

    6.1. Install the finger section of the tool in front of the bushing.
    6.2. Install the tube and forcing screw to the finger section. Ensure the forcing screw is backed out.
    6.3. Using a wrench on the forcing screw, remove the rear output shaft bushing.

Installation Procedure


    Object Number: 801307  Size: SH
  1. Install a NEW rear output shaft bushing.
  2. For the light duty transfer case use J 45380 , for the heavy duty transfer case use DT-48734 .

    1.1. Install the bushing on the finger section of the tool .
    1.2. Install the finger section to the main body of the tool .
    1.3. Position the bushing and tool to the case.
    1.4. Install the bushing using a hammer and the tool.

    Object Number: 687288  Size: SH
  3. Position the transfer case rear output shaft seal in the transfer case.
  4. Install the transfer case front output shaft seal.
  5. For the light duty transfer case use J 37668-A , for the heavy duty transfer case use DT-48021 .

  6. Install the rear propeller shaft.
  7. • For vehicles equipped with the one piece propeller shaft, refer to One-Piece Propeller Shaft Replacement .
    • For vehicles equipped with the two piece propeller shaft, refer to Two-Piece Propeller Shaft Replacement .
  8. Check the transfer case fluid level. Refer to Transfer Case Fluid Replacement .
  9. Install the transfer case shield. Refer to Transfer Case Shield Replacement .
  10. Lower the vehicle.