GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2004 🢒 Express - AWD 🢒 Transmission/Transaxle 🢒 Automatic Transmission - 4L80-E/4L85-E 🢒 Torque Converter Clutch Valve and Spring Replacement

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

    3. Object Number: 102558 Size: SH

    Caution: Valve springs can be tightly compressed. Use care when removing retainers and plugs. Personal injury could result.

  3. Remove the valve bore plug retainer ring (1).

    4. Object Number: 43320 Size: SH
  4. Remove the following parts:
    5. • The valve bore plug
    • The TCC valve
    • The TCC valve spring

Installation Procedure

    Object Number: 43320 Size: SH
  1. Install the following parts:
    2. • The TCC valve spring
    • The TCC valve
    • The valve bore plug

    Object Number: 102558 Size: SH
  2. Install the valve bore plug retainer ring (1).
  3. Install the transmission oil pan and oil filter. Refer to Automatic Transmission Fluid and Filter Replacement .
  4. Lower the vehicle.
  5. Fill the transmission to the proper level with DEXRON® VI transmission fluid. Refer to Transmission Fluid Check .

    6. Important: It is recommended that transmission adaptive pressure (TAP) information be reset.

    Resetting the TAP values using a scan tool will erase all learned values in all cells. As a result, The ECM, PCM or TCM will need to relearn TAP values. Transmission performance may be affected as new TAP values are learned.

  6. Reset the TAP values. Refer to Transmission Adaptive Functions .