GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 2008 🢒 Sierra - 2WD 🢒 Transmission/Transaxle 🢒 Automatic Transmission - Allison 🢒 Manual Shift Shaft Seal Replacement

Tools Required
    • J 43911 Manual Shift Shaft Seal Remover
    • J 43909 Manual Shift Shaft Seal Installer

Removal Procedure

    Object Number: 659335 Size: SH
  1. Be sure that the jackscrew for J 43911 is backed off and will not interfere with installation of the removal tool. Slide the seal remover tool over the manual shift shaft (2) with the threaded end of the tool towards the seal.
  2. Rotate the removal tool so that the threads on the end of the tool engage the steel shell (1) of the seal. Use a wrench to be sure that the removal tool is firmly attached to the seal shell.
  3. Rotate the jackscrew in the clockwise direction to remove the seal from the bore. Discard the seal that was removed.

Installation Procedure

    Object Number: 659339 Size: SH
  1. Carefully slide a new manual shift shaft seal (1) over the manual shift shaft (2) with the wide face of the steel case facing outward. Position so that the seal is starting to enter the seal bore.
  2. Obtain J 43909 and remove the inner sleeve so that the tool will slide over the manual shift shaft.
  3. Slide the J 43909 into position so that the end of the tool contacts the seal being installed. Use a mallet to strike the J 43909 and drive the new seal into the seal bore until the seal is seated at the bottom of the bore.