LEMON Manuals: Even more car manuals for everyone
Home >> GMC >> 2006 >> Sierra 1500 HD, RWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 19 (Automatic Transmission - ALLISON - Introduction (2 Of 2)) >> Repair Instructions >> Control Valve Body Disassemble >> Disassembly Procedure

Disassembly Procedure

WARNING: This page is about a different variant/trim than selected.

Tools Required

    NOTE: Refer to Transmission Control Valve Body Overhaul Notice .
  1. Position the control valve on the work table so that the main valve body is facing up.
  2. Remove two bolts (3) retaining the reverse signal pipe.
    Fig 1: Removing Reverse Signal Pipe Bolts
    GM1581013Courtesy of GENERAL MOTORS CORP.
    3. IMPORTANT:
    • Bolt (2) is slightly longer than the other bolts (1).
    • The transmission fluid pressure (TFP) switch is retained by five bolts (1) and by bolt (2).
  3. Remove five bolts (1), and one bolt (2), retaining the TFP switch to the main valve body.
  4. Remove the reverse signal pipe (2) from the main valve body (3).
    Fig 2: Removing Reverse Signal Pipe And TFP Switch
    GM1580997Courtesy of GENERAL MOTORS CORP.
  5. Remove the TFP switch (1) from the main valve body (3).
  6. Remove the 2 bolts (1) retaining the modulated main pressure solenoid valve body (2).
    Fig 3: Removing Modulated Main Pressure Solenoid Valve Body
    GM1633324Courtesy of GENERAL MOTORS CORP.
  7. Remove the modulated main pressure solenoid valve body assembly (2) and six speed tube.
  8. Remove the six speed tube from the modulated main pressure solenoid valve body.
  9. Remove the modulated main pressure solenoid retainer (5) from the bottom of the valve body (2).
  10. Remove the modulated main pressure (MAIN MOD) solenoid (6).
  11. Remove the 2 O-rings (3 and 4) from the MAIN MOD solenoid (6).
    12. IMPORTANT: The torque converter clutch (TCC) pressure control solenoid (PCS) retaining bracket (2) must not be modified. Note that the angle between the 2 bracket surfaces is less than 90 degrees. Replace the bracket if the angle is 90 degrees or more.
    Fig 4: Removing TCC PCS And Related Components From Main Valve Body
    GM1581001Courtesy of GENERAL MOTORS CORP.
  12. Remove the bolt (1) that retains the TCC PCS retaining bracket (2) to main valve body.
  13. Remove the TCC PCS retaining bracket (2).
  14. Remove the TCC PCS (7), valve (4), and spring (3).
  15. Remove the O-rings (5 and 6) from the TCC PCS (7).
  16. Remove the shift solenoid 1 (SS1) retainer (1).
    17. Fig 5: Removing Shift Solenoid 1 From Main Valve Body
    GM1331377Courtesy of GENERAL MOTORS CORP.
  17. Remove the SS1.
  18. Remove the O-rings (2 and 3) from SS1 (4).
    19. Fig 6: Removing Shift Solenoid 3
    GM1331380Courtesy of GENERAL MOTORS CORP.
  19. Remove shift solenoid 3 (SS3) retainer (1).
  20. Remove SS3 (4).
  21. Remove the O-rings (2 and 3) from the SS3 (4).
    22. Fig 7: Removing Pressure Control Solenoid Retaining Bracket Bolts
    GM1331541Courtesy of GENERAL MOTORS CORP.
  22. Remove the 3 bolts (1) that retain the PCS retaining bracket (2) to the main valve body (3).
  23. Remove the PCS retaining bracket (1), 2 accumulator springs (2), and 2 accumulator plugs (3).
    Fig 8: Removing Pressure Control Solenoids 1 And 2
    GM1331385Courtesy of GENERAL MOTORS CORP.
  24. Remove the pressure control solenoid 1 (PCS1) (15), valve (13), spring (12), valve (11), and spring (10).
  25. Remove the pressure control solenoid 2 (PCS2) (9), valve (7), valve (6), and spring (5).
  26. Remove the O-ring (14) from PCS1 (15).
  27. Remove the O-ring (8) from PCS2 (9).
  28. Position the control valve module on the work table so that shift valve body (1) is facing up.
  29. Remove the SS1 retainer (2).
    30. Fig 9: Removing Shift Solenoid 1 From Shift Valve Body
    GM1331386Courtesy of GENERAL MOTORS CORP.
  30. Remove the SS1 (5).
  31. Remove the O-rings (3 and 4) from the SS1 (5).
    32. Fig 10: Removing Shift Valve Body Retaining Bolts
    GM1633330Courtesy of GENERAL MOTORS CORP.
  32. Remove eleven bolts (1) retaining the shift valve body and the main valve body together.
  33. Position the control valve module on the work table so that the main valve body is facing up. Reinstall four bolts (1) so that the bolts are partially threaded into the shift valve body and protrude from the main valve body.
  34. Position the control valve module on edge so that the top and bottom are vertical.
  35. Gently tap the bolts until the module separates.
  36. Position the control valve assembly on the work table so that shift valve body (1) is facing up.
  37. Separate shift valve body assembly (1), separator plate (2), and main valve body assembly (4).
    Fig 11: Separating Shift Valve Body Assembly, Separator Plate, And Main Valve Body Assembly
    GM1331397Courtesy of GENERAL MOTORS CORP.
scientia non olet · About LEMON Manuals