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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 999 (Automatic Transmission - ALLISON (Introduction, Service & Replacement)) >> Repair Instructions >> Control Valve Body Assemble >> Control Valve Body Assembly

Control Valve Body Assembly

WARNING: This page is about a different car, the 2004 GMC Sierra, 2004 GMC Cab & Chassis Sierra, 2004 Chevrolet Silverado, and 2004 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
  1. Position main valve body assembly (4) on the work table so that the worm-track side is up.
    Fig 1: Installing The Shift Valve Body Assembly Onto The Separator Plate
    GM1331397Courtesy of GENERAL MOTORS CORP.
  2. Align separator plate (2) with main valve body locating pins (3).
  3. Install separator plate (2).
  4. Align shift valve body assembly (1) with main valve body locating pins (3).
  5. Install the shift valve body assembly onto the separator plate.
  6. Position the control valve assembly on the work table so that the main valve body is facing up.
  7. Install fourteen bolts (1) retaining the valve bodies together.

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

    Fig 2: Installing Fourteen Bolts Retaining The Valve Bodies Together
    GM1331387Courtesy of GENERAL MOTORS CORP.
  8. Position the control valve assembly on the work table so that the shift valve body is up.
    9. IMPORTANT:
    • O-ring (4) is slightly larger than O-ring (3).
    • P/N 29536833 is printed on shift solenoid C (5).
    Fig 3: Installing Shift Solenoid C Assembly
    GM1331386Courtesy of GENERAL MOTORS CORP.
  9. Install solenoid O-ring (4) onto shift solenoid C (5).
  10. Install solenoid O-ring (3) onto shift solenoid C (5).
  11. Align shift solenoid C (5) so that the electrical connector points away from the nearest locating pin and is parallel to the separator plate as shown.
  12. Install the solenoid retainer (2).
  13. Position the control valve assembly on the work table so that main valve body (16) is facing up.
    Fig 4: Installing Pressure Control Solenoid A and B Assemblies
    GM1331385Courtesy of GENERAL MOTORS CORP.
    14. IMPORTANT: P/N 29533074 is printed on the pressure control solenoid A.
  14. Install solenoid O-ring (14) onto pressure control solenoid A (15).
    15. IMPORTANT: P/N 29533075 is printed on the pressure control solenoid B.
  15. Install solenoid O-ring (8) onto pressure control solenoid B (9).
  16. Install spring (10), A trim valve (11), spring (12), and trim gain valve (13).
  17. Install spring (5), B trim valve (6) and trim gain valve (7).
  18. Install pressure control solenoid A (15) so that the electrical connection faces up. Do not seat the solenoid.
  19. Install pressure control solenoid B (9) so the electrical connection faces up. Do not seat the solenoid.
  20. Align 2 accumulator plugs (3) so that the spring bores face up.
  21. Install 2 accumulator plugs (3) and 2 accumulator springs (2).
  22. Push the pressure control solenoid A and B into the bores until the solenoids seat.
  23. Align the pressure control solenoid retaining bracket (1) with main valve body locating pin (4).
  24. Install the pressure control solenoid retaining bracket (1) so that the pressure control solenoids A and B, the accumulator plugs, and the accumulator springs are retained against the valve body.
    25. NOTE: Refer to Fastener Notice in Cautions and Notices.
    Fig 5: Installing Pressure Control Solenoid Retaining Bracket
    GM1331541Courtesy of GENERAL MOTORS CORP.
  25. Install 3 bolts (1) retaining the pressure control solenoid retaining bracket (2).

    Tighten:  Tighten bolts (1) to 12 N.m (108 lb in).

    26. IMPORTANT:
    • The solenoid O-rings are brown.
    • O-ring (3) is slightly larger than O-ring (2).
    • P/N 29536833 is printed on the shift solenoid E.
    Fig 6: Installing Shift Solenoid E Assembly
    GM1331380Courtesy of GENERAL MOTORS CORP.
  26. Install solenoid O-ring (3) onto shift solenoid E (4).
  27. Install solenoid O-ring (2) onto shift solenoid E (4).
  28. Install shift solenoid E (4) so that the electrical connection faces up. seat the solenoid.
  29. Install solenoid retainer (1).
    30. IMPORTANT:
    • The solenoid O-rings are brown.
    • O-ring (3) is slightly larger than O-ring (2).
    • P/N 29536833 is printed on shift solenoid D.
    Fig 7: Installing Shift Solenoid D Assembly
    GM1331377Courtesy of GENERAL MOTORS CORP.
  30. Install solenoid O-ring (3) onto shift solenoid D (4).
  31. Install solenoid O-ring (2) onto shift solenoid D (4).
  32. Install shift solenoid D (4) so that the electrical connection faces up. seat the solenoid.
  33. Install solenoid retainer (1).
    34. IMPORTANT:
    • The solenoid O-rings are brown.
    • O-ring (6) is slightly larger than O-ring (5).
    Fig 8: Installing TCC PWM Solenoid Assembly
    GM1331372Courtesy of GENERAL MOTORS CORP.
  34. Install solenoid O-ring (6) onto the TCC PWM solenoid (7).
  35. Install solenoid O-ring (5) onto the TCC PWM solenoid (7).
  36. Install the TCC PWM spring (2).
  37. Install the TCC PWM valve (3)
  38. Install the TCC PWM sleeve (4)
  39. Align the TCC PWM solenoid (7) so that the electrical connection faces up.
  40. Install the TCC PWM solenoid. Seat the solenoid.
  41. Install solenoid retainer (1).
  42. Install the O-rings (3 and 4) onto the modulated main pressure solenoid G (6).
    Fig 9: Installing Modulated Main Pressure Solenoid G Assembly
    GM1332352Courtesy of GENERAL MOTORS CORP.
  43. Install the modulated main pressure solenoid G (6).
  44. Install the modulated main pressure solenoid G retainer (5) into the bottom of the valve body.
  45. Install the modulated main pressure solenoid G body assembly (2).
    46. IMPORTANT: Four bolts pass through the modulated main pressure solenoid G valve body to retain the control valve body assembly to the transmission case. Install these bolts when installing the control valve body assembly.
  46. Install the 2 bolts (1) retaining the modulated main pressure solenoid G valve body and the shift valve body to the main valve body.

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

  47. Align the bolts holes and alignment tabs of the TFP switch (1) with the TFP switch holes in main valve body (3).
    Fig 10: Installing Tfp Switch And Reverse Signal Pipe
    GM1331367Courtesy of GENERAL MOTORS CORP.
  48. Install TFP switch (1) onto main valve body (3).
  49. Install reverse signal pipe (2) onto the main valve body.
    50. IMPORTANT: Seven bolts retain the reverse signal pipe and the TFP switch.
    • Bolt (2) is slightly longer than the other bolts (1).
    • The TFP switch is retained by five bolts (1) and by bolt (2).
    • The reverse signal pipe is retained by bolt (1) and by bolt (2).
    Fig 11: Installing Bolts Retaining The Reverse Signal Pipe And The TFP Switch To The Main Valve Body
    GM1387802Courtesy of GENERAL MOTORS CORP.
  50. Install six bolts (1) and one bolt (2) retaining the reverse signal pipe and the TFP switch to the main valve body.

    Tighten:  Tighten bolts (1) and bolt (2) to 12 N.m (108 lb in).

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