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Home >> GMC >> 2006 >> Sierra 1500 HD, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 237 (Automatic Transmission - 4L80-E/4L85-E (Service & Replacement)) >> Repair Instructions >> Valve Body and Pressure Switch Replacement >> Installation Procedure

Installation Procedure

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  1. Install the 8 checkballs (9 checkballs for some models) into the control valve body.
    • 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 control valve body.
    Fig 1: Installing Checkballs Into Control Valve Body
    G02424577Courtesy 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).
    Fig 2: Installing Manual 2-1 Band Servo Piston Seal, Pin & Pin Retainer Ring
    G02424578Courtesy of GENERAL MOTORS CORP.
  6. Install the manual 2-1 band servo piston cushion spring (2).

    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 assembly (1).
    Fig 3: Installing Manual 2-1 Band Servo Piston Cushion Spring & Assembly
    G02424579Courtesy of GENERAL MOTORS CORP.
  8. Install the manual valve (1) into the control valve body.
    Fig 4: Installing Manual Valve
    G02424580Courtesy of GENERAL MOTORS CORP.
  9. To aid in alignment and assembly, install tool J 25025  .
  10. Install the control valve body gasket (6).
  11. Install the control valve body assembly (5). Attach the manual valve to the detent lever while installing the control valve body assembly.
    Fig 5: Installing Control Valve Body Gasket & Assembly
    G02424581Courtesy of GENERAL MOTORS CORP.
  12. Install the transmission fluid pressure manual valve position switch (2).
  13. Install the transmission fluid pressure manual valve position switch bolts (1) finger tight.
    Fig 6: Installing Transmission Fluid Pressure Manual Valve Position Switch & Bolts
    G02424582Courtesy of GENERAL MOTORS CORP.
  14. Tighten the bolts in the order shown to 11 N.m (97 lb in).
  15. Remove the J 25025  .
    Fig 7: Tightening Transmission Fluid Pressure Manual Valve Position Switch Bolts
    G02424583Courtesy of GENERAL MOTORS CORP.
  16. Install the manual shaft detent roller and spring assembly (3) and bolts.
  17. Install the two 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 control valve body.
  20. Install the lube oil pipe retainer (7) and the bolt (6).
    Fig 8: Installing Manual Shaft Detent Roller/Spring Assembly, Lube Oil Pipe & Components
    G02424584Courtesy of GENERAL MOTORS CORP.
    CAUTION: Refer to FASTENER NOTICE .
  21. Install the control valve body bolts.

    Tighten 

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

  22. Install the remaining control valve body bolts.

    Tighten 

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

  23. Connect the internal wiring harness to the valve body electrical components.
  24. Install the oil pan, gasket, and filter. Refer to Automatic Transmission Fluid/Filter Replacement .
  25. Lower the vehicle.
    Fig 9: Installing & Tightening Control Valve Body Bolts
    G02424585Courtesy of GENERAL MOTORS CORP.
  26. Fill the transmission to the proper level using approved fluid.
  27. Fill the transmission to the proper level with Dexron® III transmission fluid. Refer to Transmission Fluid Checking Procedure .
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