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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 >> 1-2-3-4-5-6 Clutch Piston Housing Assembly Installation >> Installation

1-2-3-4-5-6 Clutch Piston Housing Assembly Installation: 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: View Of Main Shaft Holder & Mounting Bolts
    GM1216913Courtesy of GENERAL MOTORS CORP.
  1. Position the transmission case so that the front of the case is facing up.
  2. Remove 2 bolts (2) from J 44587  (1). See Special Tools .
  3. Remove J 44587  from the power take-off (PTO) access. See Special Tools .
    4. Fig 2: Locating Thrust Bearing Assembly
    GM1217467Courtesy of GENERAL MOTORS CORP.
  4. Apply J 36850  or equivalent lubricant to the thrust bearing assembly (1). See Special Tools .
    5. NOTE: Installing the thrust bearing incorrectly may cause permanent damage to the transmission.
  5. Align the thrust bearing (1) so that the blue stripe on the thrust bearing is facing towards the input carrier assembly.
  6. Install the thrust bearing (1) into the input carrier assembly.
    7. Fig 3: Identifying 1-2-3-4, 4-5-6 Clutch Assembly
    GM1216915Courtesy of GENERAL MOTORS CORP.
  7. Install the 1-2-3-4, 4-5-6 clutch assembly (1).
  8. Rotate the clutch assembly until the assembly seats.
  9. Make sure one of the following is visible through the turbine speed sensor hole in the transmission case:
    • The teeth of the PTO gear
    • The teeth of the turbine tone wheel
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