GM Service Manual Online
For 1990-2009 cars only

Removal Procedure

  1. Remove the oil pan.
  2. Remove the oil filter and the filter seal. Refer to Automatic Transmission Fluid and Filter Replacement .
  3. Remove the control valve body. Refer to Valve Body .

  4. Object Number: 14464  Size: SH
  5. Remove the accumulator cover bolts.

  6. Object Number: 14467  Size: SH
  7. Remove the 1-2 accumulator cover and pin, piston, and springs. The piston may remain inside cover and pin.

  8. Object Number: 14468  Size: SH
  9. Remove the spacer plate support bolts.
  10. Remove the spacer plate support.

  11. Object Number: 14469  Size: SH
  12. Remove the spacer plate and the spacer plate gaskets.

  13. Object Number: 29443  Size: SH
  14. Remove the 3-4 accumulator spring, the piston, and the pin.
  15. Inspect the accumulator assembly. Refer to Torque Converter Clutch (TCC) Diagnosis .

Installation Procedure

Tools Required:

    • J 25025-B Pump and Valve Body Alignment Pin Set
    • J 36850 Transmission Assembly Lube

    Object Number: 29443  Size: SH
  1. Install the 3-4 accumulator pin into the transmission case.
  2. Install the 3-4 accumulator piston oil seal ring to the piston, if removed.
  3. Install the 3-4 accumulator piston onto the pin. The piston legs must face the valve body.
  4. Install the 3-4 accumulator piston spring.
  5. Install the J 25025-B to the transmission case.

  6. Object Number: 14469  Size: SH
  7. Install the case gasket and the valve body gasket to the spacer plate. The case gasket is identified by a C. The valve body gasket is identified by a V.
  8. Use the J 36850 in order to retain the gaskets to the spacer plate.
  9. Install the spacer plate and the gaskets to the transmission case.

  10. Object Number: 14468  Size: SH
  11. Install the spacer plate support and the spacer plate support bolts.
  12. Tighten
    Tighten the bolts to 11 N·m (97 lb in).

    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.

  13. Install the oil seal ring to the 1-2 accumulator piston, if removed.

  14. Object Number: 14467  Size: SH
  15. Install the 1-2 accumulator piston with the piston legs facing toward the accumulator cover.
  16. Install the 1-2 accumulator springs onto the piston.

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

  20. Remove the J 25025-B from the transmission case.
  21. Install the control valve body. Refer to Valve Body .
  22. Install the oil filter and the filter seal. Refer to Automatic Transmission Fluid and Filter Replacement .
  23. Install the oil pan.