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Home >> GMC >> 2006 >> Sierra 1500 HD, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1355 (Automatic Transmission - ALLISON - Removal & Installation, Service, Overhaul, Troubleshooting & Diagnosis) >> Repair Instructions - Off Vehicle >> Manual Shift Shaft, Detent Lever, and Position Switch Assembly Assemble >> Assembly Procedure

Assembly Procedure

WARNING: This page is about a different car, the 2009 GMC Sierra, 2009 GMC Cab & Chassis Sierra, 2009 Chevrolet Silverado, and 2009 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
    Fig 1: Installing A New Manual Shift Shaft Seal Using J 43909
    GM1217162Courtesy of GENERAL MOTORS CORP.
  1. Install a new manual shift shaft seal (1) onto J 43909:  installer (2).
  2. Using J 43909:  installer (2), drive the manual shift shaft seal (1) into the transmission case.
  3. Make sure the manual shift shaft seal is seated on the bottom of the bore.
    4. Fig 2: View of Detent Lever/IMS Assembly & Park Pawl Assembly
    GM1640907Courtesy of GENERAL MOTORS CORP.
  4. Install the nib of the park pawl assembly (1) through the keyhole in the detent lever/internal mode switch (IMS) assembly (2).
  5. Rotate the park pawl assembly 180 degrees.
    6. Fig 3: Identifying Manual Shift Shaft
    GM1581025Courtesy of GENERAL MOTORS CORP.
  6. Place the roller end of the park pawl assembly (5) into the transmission case.
  7. Align the detent lever/IMS assembly (3) so that:
    • The detent notches of the detent lever are facing up.
    • The IMS connector is facing towards the rear of the transmission.
    • The guide hole for the manual valve pin is facing forward.
    • The manual shift shaft hole in the detent lever is aligned with the manual shift shaft seal (2).
  8. Slide the manual shift shaft (1) through the following components:
    • Transmission case
    • Manual shift shaft seal (2)
    • Detent lever/IMS assembly (3)
    9. Fig 4: Identifying Detent Lever/IMS Assembly Retaining Bolt
    GM1581023Courtesy of GENERAL MOTORS CORP.
    NOTE: The detent lever/IMS assembly retaining bolt contains patch lock material on the threads. Do not reuse the retaining bolt.
  9. Install the detent lever/IMS assembly (2) onto the manual shift shaft (1).
  10. Install the detent lever/IMS assembly retaining bolt (3).
    11. CAUTION: Refer to Fastener Caution .
  11. Using a T27 Torx® bit, tighten the detent lever/IMS assembly retaining bolt (3). Tighten the bolt to 10 N.m (89 lb in).
    12. Fig 5: Locating Spherical Pin At Transmission Case
    GM1581027Courtesy of GENERAL MOTORS CORP.
    CAUTION: DO NOT twist the spherical pin when removing the pin from the transmission case. Damage to the transmission case can occur.
  12. Install the spherical pin (1) into the transmission case.
  13. Lightly tap the spherical pin (1) into position until the head of the pin (1) is seated against the transmission case.
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