GM Service Manual Online
For 1990-2009 cars only

Tools Required

J 42738 Seal Installer

Removal Procedure


    Object Number: 678215  Size: SH
  1. Raise the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
  2. Remove the transfer case assembly. Refer to Transfer Case Assembly Replacement .
  3. Notice: Do not damage the sealing surfaces of the transfer cases or the shafts when prying the seals for removal. Damaging the sealing surface may cause leakage or require replacement of the damaged component.

  4. Remove the transfer case input shaft seal.

Installation Procedure


    Object Number: 678288  Size: SH

    Important: When installing the transfer case input shaft seal, make sure that the part numbers on the seal are facing outward (toward the technician). The transfer case input shaft seal should be even with the surface of the transfer case after installation.

  1. Position the transfer case input seal on the input shaft.
  2. Using the J 42738 , install the transfer case input shaft seal.
  3. Install the transfer case assembly. Refer to Transfer Case Assembly Replacement .
  4. Inspect the transfer case fluid level. Refer to Transfer Case Fluid Replacement .
  5. Lower the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.