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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 - On Vehicle >> Valve Body and Pressure Switch Replacement >> Installation Procedure

Installation Procedure

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: Locating Checkballs & PWM Screen
    GM237284Courtesy of GENERAL MOTORS CORP.
  1. Install the 8 checkballs (9 for some models) into the transmission case passages.
    • The checkball marked as number 2, is used on RCP, RDP, ZJP and ZLP models only
    • To hold the checkballs in place, use the J 36850  .
  2. Install the PWM screen into the valve body.
    3. Fig 2: Manual 2-1 Band Servo Piston Assembly
    GM477871Courtesy of GENERAL MOTORS CORP.
  3. Install a new manual 2-1 band servo piston seal (2) onto the manual 2-1 band servo piston (3).
  4. Install the manual 2-1 band servo piston pin (1) into the manual 2-1 band servo piston (3).
  5. Install the manual 2-1 band servo piston pin retainer ring (4).
    6. Fig 3: View Of Manual 2-1 Band Servo & Servo Piston Cushion Spring
    GM477872Courtesy of GENERAL MOTORS CORP.
  6. Install the manual 2-1 band servo piston cushion spring (2).
    7. IMPORTANT: Make certain that the tapered end of the manual 2-1 band servo piston pin contacts the manual 2-1 band.
  7. Install the manual 2-1 band servo piston (1).
    8. Fig 4: View Of Manual Valve
    GM237271Courtesy of GENERAL MOTORS CORP.
  8. Install the manual valve (1) into the valve body.
    9. Fig 5: View Of J 25025, Control Valve Body & Gasket
    GM237299Courtesy of GENERAL MOTORS CORP.
  9. To aid in alignment and assembly, install J 25025-5  .
  10. Install the valve body gasket (6).
  11. Install the valve body (5). Attach the manual valve to the detent lever while installing the valve body.
    12. Fig 6: Installing The Transmission Fluid Pressure Manual Valve Position Switch
    GM237322Courtesy of GENERAL MOTORS CORP.
  12. Install the transmission fluid pressure manual valve position switch (2).
    13. NOTE: Refer to Fastener Notice .
  13. Install the transmission fluid pressure manual valve position switch bolts (1) finger tight.
    14. Fig 7: Transmission Fluid Pressure Manual Valve Position Switch Bolt Tightening Sequence
    GM237341Courtesy of GENERAL MOTORS CORP.
  14. Tighten the bolts in the order shown.

    Tighten:  Tighten the bolts to 11 N.m (97 lb in).

  15. Remove J 25025-5  .
    16. Fig 8: View Of Manual Shaft Detent Roller/Spring, Lube Oil Pipe & Components
    GM237346Courtesy of GENERAL MOTORS CORP.
  16. Install the manual shaft detent roller and spring (3) and bolts.
  17. Install the 2 wiring harness clips (1) and bolts (2).
  18. Install the wiring harness clip (1) and bolts (2).
  19. Install the lube oil pipe (5) with the short end into the valve body.
  20. Install the lube oil pipe retainer (7) and the bolt (6).
    21. Fig 9: Valve Body Bolt Tightening Sequence
    GM54712Courtesy of GENERAL MOTORS CORP.
  21. Install the valve body bolts and tighten in the order shown.

    Tighten:  Tighten the bolts to 11 N.m (97 lb in).

  22. Install the remaining valve body bolts.

    Tighten:  Tighten the bolts to 11 N.m (97 lb in).

  23. Connect the internal wiring harness to the valve body electrical components.
  24. Install the transmission filter. Refer to Automatic Transmission Fluid and Filter Replacement .
    25. IMPORTANT: It is recommended that transmission adaptive pressure (TAP) information be reset.
    Resetting the TAP values using a scan tool will erase all learned values in all cells. As a result, the engine control module (ECM), powertrain control module (PCM), or transmission control module (TCM) will need to relearn TAP values. Transmission performance may be affected as new TAP values are learned.
  25. Reset the TAP values. Refer to Transmission Adaptive Functions .
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