GM Service Manual Online
For 1990-2009 cars only

Removal Procedure

  1. Raise the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
  2. Remove the transmission oil pan and the filter. Refer to Automatic Transmission Fluid and Filter Replacement .

  3. Object Number: 102558  Size: SH
  4. Remove the reverse boost valve bushing retainer ring (1).

  5. Object Number: 43318  Size: SH
  6. Remove the following from the reverse boost valve cylinder:
  7. • The reverse boost valve bushing
    • The reverse boost valve
    • The pressure regulator spring retainer
    • The pressure regulator spring
    • The pressure regulator valve

Installation Procedure

Tools Required

J 36850 TRANSJEL

  1. Install the pressure regulator valve withJ 36850 .

  2. Object Number: 43318  Size: SH
  3. Pre-assemble the following parts:
  4. 2.1. The reverse boost valve bushing
    2.2. A new reverse boost valve
    2.3. A new pressure regulator spring retainer
    2.4. The added isolator pressure regulator spring
    2.5. The pressure regulator spring
  5. Install the pre-assembled parts into the pump bore.

  6. Object Number: 102558  Size: SH
  7. Install the reverse boost valve bushing retainer ring while holding the reverse boost valve bushing in place.
  8. Ensure the retainer ring (1) is in the groove.

  9. Install the transmission oil pan and the oil filter. Refer to Automatic Transmission Fluid and Filter Replacement .
  10. Lower the vehicle.