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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 834 (Automatic Transmission - 4L80-E/4L85-E (Service & Replacement)) >> Repair Instructions >> Valve Body and Pressure Switch Replacement >> Installation Procedure

Installation Procedure

WARNING: This page is about a different car, the 2003 GMC Yukon XL, 2003 Chevrolet Suburban, and 2003 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.
  1. Install the 8 checkballs (9 checkballs for some models) into the 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 valve body.
    Fig 1: Installing PWM Screen
    G02112298Courtesy 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 Pin
    G02112299Courtesy 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 (1).
    Fig 3: Installing Manual 2-1 Band Servo Piston
    G02112300Courtesy of GENERAL MOTORS CORP.
  8. Install the manual valve (1) into the valve body.
    Fig 4: Installing Manual Valve From Valve Body
    G02112301Courtesy 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.
    Fig 5: Installing Valve Body & Gasket
    G02112302Courtesy 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
    G02112303Courtesy 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. 
    Fig 7: Tightening Bolts In Sequence
    G02112304Courtesy 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)
    Fig 8: Installing Lube Oil Pipe Bolt & Retainer
    G02112305Courtesy of GENERAL MOTORS CORP.
    NOTE: Refer to FASTENER NOTICE in Cautions and Notices.
  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  .
    Fig 9: Connecting Internal Wiring Harness To Valve Body Electrical Components
    G02112306Courtesy of GENERAL MOTORS CORP.
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