GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 2001 🢒 GMC K Sierra - 4WD 🢒 Driveline/Axle 🢒 Transfer Case - NVG 236/246-NP8 (Two Speed Automatic) 🢒 Rear Output Shaft Seal Replacement

Tools Required

J 37668-A Seal 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. 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 in Propeller Shaft.
    • For vehicles equipped with the two piece propeller shaft, refer to Two-Piece Propeller Shaft Replacement in Propeller Shaft.
  4. Remove the transfer case rear output shaft seal.

Installation Procedure

    Object Number: 687288 Size: SH

    Important: When installing the rear output shaft seal in the transfer case, make sure that the locating tab should be facing up.

  1. Position the rear output shaft seal in the transfer case.
  2. Using the J 37668-A , install the rear output shaft to the transfer case.
  3. Install the rear propeller shaft.
    4. • 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.
  4. Check the transfer case fluid level. Refer to Transfer Case Shield Replacement .
  5. Install the transfer case shield. Refer to Transfer Case Shield Replacement .
  6. Lower the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.