GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2004 🢒 Blazer - 4WD 🢒 Driveline/Axle 🢒 Transfer Case - NVG 233-NP1 🢒 Rear Output Shaft Seal Replacement

Tools Required

    • J 37668-A Output Shaft Seal Installer (4401 and 4470 Transfer Case)
    • J 45380 Transfer Case Rear Bushing Remover and Installer

Removal Procedure

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

    5. Object Number: 801274 Size: SH
  5. Inspect the rear output shaft bushing for scoring or wear.
  6. Remove the rear output shaft bushings if required, using the J 45380 .
    7. • Install the finger section of the J 45380 in front of the bushing.
    • Install the tube and forcing screw to the finger section. Ensure the forcing screw is backed out.
    • 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, if required, using the J 45380 .
    2. • Install the bushing or the finger section of the J 45380 .
    • Install the finger section to the main body of the J 45380 .
    • Position the bushing and tool to the case.
    • Using a hammer and the J 45380 , install the bushing.

    Object Number: 687288 Size: SH

    Important: Ensure the drain hole on the boot of the rear output shaft seal is facing down toward the ground.

  2. Install the transfer case rear output shaft seal in the transfer case with your fingers.
  3. Using the J 37668-A , install the transfer case rear output shaft seal.
  4. Install the rear propeller shaft in to the transfer case.
    5. • For vehicles equipped with the one piece propeller shaft, refer to One-Piece Propeller Shaft Replacement in Propeller Shaft.
    • For vehicles equipped with the two piece propeller shaft, refer to Two-Piece Propeller Shaft Replacement in Propeller Shaft.
    • Check the transfer case fluid level. Refer to Transfer Case Fluid Replacement .
  5. Install the transfer case shield to the vehicle. Refer to Transfer Case Shield Replacement .
  6. Lower the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.