GM Service Manual Online
For 1990-2009 cars only

Removal Procedure


    Object Number: 14464  Size: SH
  1. Remove the accumulator cover bolts.
  2. Remove the 1-2 accumulator cover and pin, piston, and springs.

  3. Object Number: 475752  Size: SH
  4. Remove the 1-2 accumulator inner (3) and outer (2) piston spring.
  5. Remove the 1-2 accumulator piston (1).

  6. Object Number: 475877  Size: SH
  7. Remove the 1-2 accumulator piston oil seal ring (1) from the 1-2 accumulator piston (2).

  8. Object Number: 475689  Size: SH
  9. If required, remove the checkball (1) from the valve body (2).

  10. Object Number: 14468  Size: SH
  11. Remove the oil pass cover bolts.
  12. Remove the oil pass cover.

  13. Object Number: 14469  Size: SH
  14. Remove the spacer plate, case gasket, and valve body gasket from the valve body.

  15. Object Number: 475750  Size: SH
  16. Check the solenoid screens (1 and 2) on the spacer plate for damage or debris.
  17. Replace the solenoid screens if necessary.


    Object Number: 475683  Size: SH
  18. Remove the 3-4 accumulator spring (1) from the valve body (3).
  19. Remove the 3-4 accumulator piston (2) from the valve body (3).
  20. Remove the accumulator pin (4) from the valve body (3).

  21. Object Number: 475673  Size: SH
  22. Remove the 3-4 accumulator piston oil ring seal from the 3-4 accumulator piston (2).
  23. Remove the remaining control valve body if required. Refer to Valve Body .

Installation Procedure

Tools Required

    • J 25025-5 Valve Body Alignment Pin Set
    • J 36850 Transjel® Transmission Assembly Lubricant
  1. Ensure the upper half of the control valve body is installed. Refer to Valve Body .

  2. Object Number: 475673  Size: SH
  3. Install the 3-4 accumulator piston oil ring seal (1) onto the 3-4 accumulator piston (2).

  4. Object Number: 475683  Size: SH
  5. Install the 3-4 accumulator pin (4) into the valve body (3).
  6. Install the 3-4 accumulator piston (2) onto the pin (4).
  7. Install the 3-4 accumulator piston spring (1).

  8. Object Number: 475689  Size: SH
  9. Install the checkball (1) into the valve body (2).
  10. Use a small amount of J 36850 in order to keep the checkball in the valve body.


    Object Number: 475696  Size: SH
  11. Install theJ 25025-5 into the valve body.
  12. Install the case gasket (3) and the valve body gasket (1) to the spacer plate (2). The case gasket is identified by a C. The valve body gasket is identified by a V.
  13. Use theJ 36850 in order to retain the gaskets (3) to the spacer plate (2).
  14. Install the spacer plate and the gaskets to the transmission case.

  15. Object Number: 14468  Size: SH

    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.

  16. Install the oil pass cover and the oil pass cover bolts.
  17. Tighten
    Tighten the bolts to 11 N·m (97 lb in).


    Object Number: 475877  Size: SH
  18. Install the 1-2 accumulator piston oil ring seal (1) onto the 1-2 accumulator piston (2).

  19. Object Number: 475752  Size: SH
  20. Install the 1-2 accumulator inner (3) and outer (2) springs into the accumulator housing (4).
  21. Install the 1-2 accumulator piston (1).

  22. Object Number: 14464  Size: SH
  23. Install the 1-2 accumulator cover and the cover bolts.
  24. Tighten
    Tighten the bolts to 11 N·m (97 lb in).

  25. Remove the J 25025-5 from the valve body.
  26. Install the remainder of the valve body. Refer to Valve Body .