GM Service Manual Online
For 1990-2009 cars only

Removal Procedure

Tools Required

J 29162 Output Shaft Seal Installer (4401 and 4470 Transfer Case)

    Important: This procedure applies to the front output shaft seal replacement and to the rear output shaft seal replacement.

  1. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
  2. Remove the front or the rear propeller shaft. Refer to Propeller Shaft Replacement in Propeller Shaft.

  3. Object Number: 175421  Size: SH
  4. Remove the propeller shaft yoke nut and the flat washers.
  5. The yoke nut and the flat washers are not used at the rear on some models.

  6. Remove the propeller shaft yoke.
  7. Remove the seal.
  8. Use a screwdriver in order to remove the seal. Do not damage the sealing bore.

Installation Procedure

Tools Required

J 29162 Output Shaft Seal Installer (4401 and 4470 Transfer Case)

  1. Install the seal using the J 29162 .
  2. Lubricate the seal lips with petroleum jelly or with transmission oil.


    Object Number: 175421  Size: SH
  3. Install the propeller shaft yoke.
  4. Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

  5. Install the flat washers and the nut, if used.
  6. Tighten

        • Tighten the Borg-Warner rear propeller shaft yoke nuts to 170 N·m (125 lb ft).
        • Tighten the Borg-Warner front propeller shaft yoke nut to 225 N·m (165 lb ft).
  7. Install the front or the rear propeller shaft. Refer to Propeller Shaft Replacement in Propeller Shaft.
  8. • Check the transfer case oil level and add oil as necessary. Refer to Lubrication Specifications .
    • Lower the vehicle.