GM Service Manual Online
For 1990-2009 cars only

Tools Required

    • J 25025-5 Guide Pins
    • J 36850 Transjel Lubricant

    Object Number: 1220971  Size: SH

    Important: Secondary fluid pump connector (1) is used for M33 models only.

  1. Inspect the wiring harness and solenoid assembly for the following conditions:
  2. • Damage
    • Cracked connectors
    • Exposed wires
    • Loose electrical terminals
    • Damaged wiring loom
    • Worn, missing, or cut pass-through connector O-ring seal.
  3. Install the transmission wiring harness pass-through connector into the transmission case. Ensure connector tabs lock into place.
  4. Move the harness to one side in order to install the valve body.

  5. Object Number: 7741  Size: SH

    Important: Valve bodies are model dependent.

  6. Install the checkballs (2-6, 8, 12) in the valve body and retain checkballs with J 36850 or an equivalent.

  7. Object Number: 7742  Size: SH
  8. Install the valve body over the J 25025-5 Guide Pins, and connect the manual valve link to the manual valve.
  9. Install two bolts to hold the valve body in place.
  10. Remove the J 25025-5 .

  11. Object Number: 1462820  Size: SH
  12. Install the valve body bolts (62) that are shown only.
  13. Finger tighten the bolts.

  14. Object Number: 829178  Size: SH
  15. Inspect the Transmission Fluid Pressure (TFP) Manual Valve Position Switch Assembly for the following conditions:
  16. • Damage
    • Debris
    • Damaged or missing O-rings
    • Cracked connector
    • Loose electrical terminals
    • Poor terminal retention
    • Sediment in switch membrane

    Object Number: 829171  Size: SH
  17. Install the TFP manual valve position switch (69) and bolts (62, 70).

  18. Object Number: 880287  Size: SH
  19. Install the transmission wiring harness on the valve body.
  20. Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

  21. Install the TCC solenoid valve and bolts (68).
  22. Tighten
    Tighten the bolts to 8-14 N·m (6-10 lb ft).


    Object Number: 1220976  Size: SH

    Notice: Do not over-tighten the bolts. Over-tightening the bolts will distort the valve bores. Begin tightening from the center of the valve body tighten the bolts in a outward direction.

  23. Check that all the valve body bolts are in the correct location.
  24. Each bolt number refers to a specific bolt size, as indicated by the following list:

    • 1 -- M6 x 1.0 x 65.0
    • 2 -- M6 x 1.0 x 54.4
    • 3 -- M6 x 1.0 x 47.5
    • 4 -- M6 x 1.0 x 17.7
    • 5 -- M6 x 1.0 x 35.0
  25. Tighten the bolts from the center of the valve body working your way out in a spiral pattern to the outside edge.
  26. Tighten
    Tighten the bolts to 8-14 N·m (6-10 lb ft).


    Object Number: 405022  Size: SH
  27. Install the TCC PWM solenoid valve (396) and the solenoid retainer (395).

  28. Object Number: 880285  Size: SH
  29. Snap the wiring harness in place on the valve body bolts. Ensure the harness loom tab is located under the TFP switch.
  30. Install the wiring connectors to the electrical components as indicated by the following list:
  31. • 1 - Transmission Fluid Pressure (TFP) manual valve position switch
    • 2 - 1-2 Shift Solenoid
    • 3 - 2-3 Shift Solenoid
    • 4 - Pressure Control Solenoid (PCS)
    • 5 - Torque Converter Clutch Pulse Width Modulation (TCC PWM) Solenoid
    • 6 - 3-2 Shift Solenoid