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Home >> GMC >> 2006 >> Sierra 1500 HD, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1035 (Automatic Transmission - ALLISON - Removal & Installation, Service, Overhaul, Troubleshooting & Diagnosis) >> Off-Vehicle Repair Information >> Control Valve Body Assembly Installation

Control Valve Body Assembly Installation

WARNING: This page is about a different car, the 2008 GMC Sierra, 2008 GMC Cab & Chassis Sierra, 2008 Chevrolet Silverado, and 2008 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
    Fig 1: Park Pawl Cam Guide Hole
    GM1235585Courtesy of GENERAL MOTORS CORP.
    IMPORTANT: Installing a lint-free cloth into the park pawl cam guide hole prevents the manual valve pin from falling into the transmission.
  1. Install a lint-free cloth (1) in the park pawl cam guide hole in the transmission case (2).
  2. Position the transmission case so that the valve body face of the transmission case is facing up.
    3. Fig 2: Manual Valve And Pin
    GM1581037Courtesy of GENERAL MOTORS CORP.
  3. Align the manual valve pin (3) with the manual selector valve (2).
  4. Rotate the manual valve pin (3) until the pin can be installed into the manual selector valve.
  5. Install the manual valve pin (3) into the manual selector valve (2).
  6. Install the manual selector valve into shift valve body (1).
    7. Fig 3: Detent Lever/IMS Assembly
    GM1581034Courtesy of GENERAL MOTORS CORP.
    IMPORTANT: Do not drop the manual valve when removing or installing the control valve assembly onto or from the transmission case.
  7. Rotate the detent lever/internal mode switch (IMS) assembly to the fullest counter-clockwise position.
  8. Align the control valve assembly with the transmission case while installing the manual valve pin (2) into the detent lever/IMS assembly (1).
    9. Fig 4: Control Valve Body Assembly
    GM1581033Courtesy of GENERAL MOTORS CORP.
  9. Align 2 control valve assembly locating pins (1) with the locating pin holes in the transmission case.
  10. Install the control valve body assembly (2) onto the transmission case.
    11. Fig 5: Park Pawl Cam Guide Hole
    GM1665611Courtesy of GENERAL MOTORS CORP.
  11. Remove the lint-free cloth (1) from the park pawl cam guide hole.
    12. Fig 6: Control Valve Assembly Bolts
    GM1633290Courtesy of GENERAL MOTORS CORP.
    NOTE: Refer to Fastener Notice .
  12. Install 11 control valve assembly bolts (1) and 4 control valve assembly bolts (2).

    Tighten:  Tighten the bolts to 12 N.m (108 lb in).

    13. Fig 7: Manual Shift Shaft Detent Spring
    GM1581029Courtesy of GENERAL MOTORS CORP.
  13. Install the manual shift shaft detent spring (2) onto the main valve body (4).
  14. Make sure the pin of the manual shift shaft detent spring (2) engages the slot of the IMS and the detent spring roller rests on the detent lever (3).
  15. Install 2 manual shift shaft detent spring bolts (1).

    Tighten:  Tighten the bolts to 12 N.m (108 lb in).

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