Kent-Moore Tools Kent-Moore J-34539 King Pin / Idler Shaft Adapter For General Motors. 1999 - 1/2 & Later T-Series & W5 with Isuzu MLD6Q 6-Speed manual transmission The reverse gear shaft is press to fit into the case bearing, and must be removed using previously essential J-02619-A Slide Hammer. The reverse gear shaft has a 12mm internal thread, while J-02619-A has a 5/8-18 thread. J-34539 must be used with J-02619-A to prevent damage to the reverse gear shaft. Thread J-34539 into the reverse gear shaft. Then, attach J-02619-A to J-34539, and use to remove the reverse gear shaft from the case. Email for product availability.