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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 >> Control Valve Body Assembly Disassemble >> Disassembly Procedure

Disassembly 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: Identifying TFP Switch Retaining Bolts
    GM1580996Courtesy of GENERAL MOTORS CORP.
  1. Position the control valve assembly on the work table so that the main valve body assembly is facing up.
  2. Remove 6 bolts (1) retaining the transmission fluid pressure (TFP) switch to the main valve body.
    3. Fig 2: Identifying TFP Switch & Reverse Signal Pipe
    GM1580997Courtesy of GENERAL MOTORS CORP.
  3. Remove the TFP switch (1) from the main valve body (3).
  4. Remove 2 bolts retaining the reverse signal pipe (2) to the main valve body (3).
  5. Remove the reverse signal pipe (2) from the main valve body (3).
    6. Fig 3: Identifying Modulated Main Pressure Solenoid Valve Body
    GM1580999Courtesy of GENERAL MOTORS CORP.
  6. Remove 2 bolts (1) retaining the modulated main pressure solenoid valve body to the main valve body (3).
    7. NOTE: To help prevent confusing parts on assembly, use J 33163:  tray to store the removed control valve assembly valves, springs, and stops.
  7. Remove the modulated main pressure solenoid valve body (2) and six speed tube.
  8. Remove the modulated main pressure (MAIN MOD) solenoid retainer (5) from the bottom of the valve body.
  9. Remove the MAIN MOD solenoid (3).
  10. Remove 2 O-rings (4) from the MAIN MOD solenoid (3).
    11. Fig 4: Identifying TCC PCS & Components
    GM1581001Courtesy of GENERAL MOTORS CORP.
  11. Remove 1 bolt (1) retaining the torque converter clutch pressure control solenoid (TCC PCS) bracket to the main valve body.
  12. Remove the TCC PCS bracket (2).
  13. Remove the TCC PCS (7), valve (4), and spring (3).
  14. Remove the O-rings (5, 6) from the TCC PCS (7).
    15. Fig 5: Shift Solenoid Assembly
    GM1331377Courtesy of GENERAL MOTORS CORP.
  15. Remove the shift solenoid 2 (SS2) retainer (1).
  16. Remove the SS2 (4).
  17. Remove the O-rings (2, 3) from the SS2 (4).
    18. Fig 6: Identifying Shift Solenoid Assembly
    GM1331380Courtesy of GENERAL MOTORS CORP.
  18. Remove the shift solenoid 3 (SS3) retainer (1).
  19. Remove the SS3 (4).
  20. Remove the O-rings (2, 3) from SS3 (4).
    21. Fig 7: View Of Pressure Control Valve Retaining Bracket Retaining Bolts
    GM1331541Courtesy of GENERAL MOTORS CORP.
  21. Remove 3 bolts (1) that retain the PCS1 and PCS2 retaining bracket (2) to the main valve body (3).
    22. Fig 8: Identifying Pressure Control Solenoid Components
    GM1581003Courtesy of GENERAL MOTORS CORP.
  22. Remove the PCS1 and PCS2 retaining bracket (1), 2 accumulator springs (2), and 2 accumulator plugs (3).
  23. Remove the PCS1 (15), valve (13), spring (12), valve (11), and spring (10).
  24. Remove the PCS2 (9), valve (7), valve (6), and spring (5).
  25. Remove the O-ring (14) from the PCS1 (15).
  26. Remove the O-ring (8) from the PCS2 (9).
    27. Fig 9: Identifying Shift Solenoid 1
    GM1581004Courtesy of GENERAL MOTORS CORP.
  27. Position the control valve body on the work table so that the shift valve body (1) is facing up.
  28. Remove the shift solenoid 1 (SS1) retainer (2).
  29. Remove the SS1 (5).
  30. Remove the O-rings (3, 4) from SS1 (5).
    31. Fig 10: Identifying Shift Valve Body Bolts
    GM1581007Courtesy of GENERAL MOTORS CORP.
    CAUTION: DO NOT damage the solenoids when turning over the control valve assembly.
  31. Position the control valve assembly so that the main valve body is facing up.
  32. Remove 7 of the 11 bolts marked (1) retaining the shift valve body and the main valve body together.
  33. Position the control valve body assembly on the work table so that the main valve body is on edge, sideways.
  34. Loosen the remaining 4 bolts marked (1) so that the bolts are partially threaded into the shift valve body and protrude from the main valve body.
  35. Gently tap the bolts until the assembly separates.
    36. Fig 11: Identifying Shift Valve Body & Main Valve Body Separator Plate
    GM1331397Courtesy of GENERAL MOTORS CORP.
  36. Position the control valve assembly on the work table so that the shift valve body (1) is facing up.
  37. Separate the shift valve body assembly (1), the separator plate (2), and the main valve body assembly (4).
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