For 1990-2009 cars only
Removal Procedure
- Remove the bottom pan and seal, the scavenger screens, and the lip seals. Refer to Transfer Oil Pump Inlet Screen and Pipe Seal Replacement .
- Remove the lower valve assembly. Refer to Lower Control Valve Body Assembly Removal in the 4T80-E section of the Transmission Unit Repair Manual.
Installation Procedure
- Install the Lower Valve Assembly. Refer to Lower Control Valve Body and Transmission Fluid Pressure Switch Install in the 4T80-E section of the Transmission Unit Repair Manual.
- Install the bottom pan and seal, the scavenger screens, and the lip seals. Refer to Transfer Oil Pump Inlet Screen and Pipe Seal Replacement .
- Add DEXRON® VI transmission fluid as required. Refer to Transmission Fluid Filter Replacement and to Fluid Capacity Specifications .
- If there was a complete fluid change, reset the transmission oil life indicator. Refer to Automatic Transmission or Transaxle Fluid Change Indicator Resetting .
- Reset the TAP values. Refer to Adapt Function .
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.