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Home >> Hummer >> 2008 >> H2 4D Utility Wagon >> Repair and Diagnosis >> External Pages >> Different car >> Section 133 (Automatic Transmission - 4L80-E/4L85-E - Introduction (2 Of 2)) >> Repair Instructions >> Repair Instructions - Off Vehicle >> Control Valve Body Assembly Disassemble

Control Valve Body Assembly Disassemble

WARNING: This page is about a different car, the 2007 GMC Yukon XL and 2007 Chevrolet Suburban. However, it is still accessible from the selected car via links, so may be relevant.
    Fig 1: Inspection Area On Pressure Control Solenoid Assembly
    GM1236988Courtesy of GENERAL MOTORS CORP.
    CAUTION: Valve springs can be tightly compressed. Use care when removing retainers and plugs. Personal injury could result.
  1. Remove the pressure control solenoid clamp bolt (310) and clamp (321).
  2. Remove the pressure control solenoid assembly (320).
  3. Inspect the pressure control solenoid assembly (320) for a plugged or damaged screen.
    4. Fig 2: Identifying TCC Regulator Apply Valve & TCC Regulator Apply Valve Spring Inspection Areas
    GM40614Courtesy of GENERAL MOTORS CORP.
  4. Remove the TCC PWM solenoid valve retainer (322).
  5. Remove the TCC PWM solenoid valve assembly (323).
  6. Remove the TCC regulator apply valve pin (303). Use a drill bit to remove the spring pin.
  7. Remove the TCC regulator apply valve (324).
  8. Remove the TCC regulator apply valve spring (325).
  9. Inspect the TCC regulator apply valve (324) for porosity, scoring, and nicks.
  10. Inspect the TCC regulator apply valve spring (325) for distortion.
    11. Fig 3: View Of Actuator Feed Limit Valve & Actuator Feed Limit Valve Spring
    GM40615Courtesy of GENERAL MOTORS CORP.
  11. Remove the actuator feed limit valve spring retainer (333).
  12. Remove the actuator feed limit valve spring (327).
  13. Remove the actuator feed limit valve (328).
  14. Inspect the actuator feed limit valve (328) for porosity, scoring, and nicks.
  15. Inspect the actuator feed limit valve spring (327) for distortion.
    16. Fig 4: Removing Accumulator Valve
    GM40616Courtesy of GENERAL MOTORS CORP.
  16. Remove the accumulator valve bore plug retainer pin (303).
  17. Remove the accumulator valve bore plug (329).
  18. Remove the accumulator valve spring (330).
  19. Remove the accumulator valve (331).
  20. Inspect the accumulator valve (331) and accumulator valve bore plug (329) for porosity, scoring, and nicks.
  21. Inspect the accumulator valve spring (330) for distortion.
    22. Fig 5: Locating Pressure Control Solenoid Valve Fluid Filter Assembly
    GM40617Courtesy of GENERAL MOTORS CORP.
  22. Remove the pressure control solenoid valve fluid filter assembly (302).
  23. Inspect the pressure control solenoid valve fluid filter assembly (302) for damage.
    24. Fig 6: Identifying The Low-Reverse Ball Valve
    GM54678Courtesy of GENERAL MOTORS CORP.
  24. Remove the low-reverse ball valve seat pin (318).
  25. Remove the low-reverse ball valve seat (304).
  26. Remove the low-reverse ball valve (305).
  27. Inspect the low-reverse ball valve seat (304) and the low-reverse ball valve (305) for porosity, scoring, and nicks.
    28. Fig 7: View Of Shift Solenoid Valve Fluid Filter Assembly
    GM54680Courtesy of GENERAL MOTORS CORP.
  28. Remove the shift valve fluid filter bore plug pin (303).
  29. Remove the shift valve fluid filter bore plug (316).
  30. Remove the shift solenoid valve fluid filter assembly (317).
  31. Inspect the shift solenoid valve fluid filter assembly (317) for damage.
  32. Inspect the shift valve fluid filter bore plug (316) for porosity, scoring, and nicks.
    33. Fig 8: Removing 1-2 Shift Solenoid Valve Assembly
    GM54682Courtesy of GENERAL MOTORS CORP.
  33. Remove the 1-2 shift solenoid valve bolt (310).
  34. Remove the 1-2 shift solenoid valve assembly (313).
  35. Remove the 1-2 shift valve pin (303).
  36. Remove the 1-2 shift valve (314).
  37. Remove the 1-2 shift valve spring (315).
  38. Inspect the 1-2 shift valve (314) for porosity, scoring, and nicks.
  39. Inspect the 1-2 shift valve spring (315) for distortion.
    40. Fig 9: Identifying 2-3 Shift Solenoid Valve Assembly
    GM54686Courtesy of GENERAL MOTORS CORP.
  40. Remove the 2-3 shift solenoid valve bolt (310).
  41. Remove the 2-3 shift solenoid valve assembly (311).
  42. Remove the 2-3 shift valve pin (303).
  43. Remove the 2-3 shift valve (312).
  44. Remove the 2-3 shift valve spring (309).
  45. Inspect the 2-3 shift valve (312) for porosity, scoring, and nicks.
  46. Inspect the 2-3 shift valve spring (309) for distortion.
    47. Fig 10: Locating 3rd-Reverse Ball Valve
    GM40622Courtesy of GENERAL MOTORS CORP.
  47. Remove the 3rd-reverse ball valve seat pin (303).
  48. Remove the reverse ball valve bushing (334).
  49. Remove the 3rd-reverse ball valve (305).
  50. Remove the 3rd ball valve bushing (335) and 3rd ball valve bushing seal (307).
  51. Remove the 3-4 shift valve (308).
  52. Remove the 3-4 shift valve spring (309).
  53. Inspect the 3rd-reverse ball valve bushings (334, 335), the 3rd-reverse ball valve (305) and the 3-4 shift valve (308) for porosity, scoring, and nicks.
  54. Inspect the 3-4 shift valve spring (309) for distortion.
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