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Home >> GMC >> 2003 >> Safari Van Cargo, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 981 (Automatic Transmission - 4L80-E/4L85-E (Introduction, Service & Replacement)) >> Repair Instructions >> Valve Body and Pressure Switch Replacement >> Installation Procedure

Installation Procedure

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. 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  .
    Fig 1: Installing The 8 Checkballs (9 For Some Models)
    GM237284Courtesy of GENERAL MOTORS CORP.
  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: Installing The Manual 2-1 Band 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: Installing The Manual Valve Into The Valve Body
    GM237271Courtesy of GENERAL MOTORS CORP.
  8. Install the manual valve (1) into the valve body.
  9. To aid in alignment and assembly, install J 25025-5  .
    Fig 5: Installing J 25025-5 To Aid In Alignment And Assembly
    GM237299Courtesy of GENERAL MOTORS CORP.
  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. 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: Wiring Clips And Lube Oil Pipe
    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. NOTE: Refer to Fastener Notice in Cautions and Notices.
    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/Filter Replacement .
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