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Home >> Chevrolet >> 2009 >> Impala LTZ >> Repair and Diagnosis >> Transmission >> Hydraulic Diagrams >> Automatic Transmission - 4T65-E - Removal & Installation, Service, Overhaul, Troubleshooting & Diagnosis >> Repair Instructions - On Vehicle >> Reverse Servo Replacement >> Installation Procedure

Installation Procedure

    IMPORTANT: Follow this procedure exactly or the transaxle will have no reverse gear due to the servo pin missing the band.
  1. Jack up the driver side of the car until the driver side is higher than the differential side. This ensures that the reverse band is in the proper location and not cocked to the channel plate side of the case.
  2. Fig 1: Identifying Reverse Servo Assembly Components
    GM48173Courtesy of GENERAL MOTORS CORP.
  3. Install the servo spring (49).
  4. Install the servo assembly (42-48).
  5. Install the reverse servo cover (40) with the new O-ring seal (41).
  6. Fig 2: Removing/Installing Reverse Servo Cover Snap Ring
    GM48166Courtesy of GENERAL MOTORS CORP.
  7. Compress the servo cover (40) and install the snap ring (39).
  8. Install the exhaust crossover pipe. Refer to Exhaust Crossover Pipe Replacement (LS4) or Exhaust Crossover Pipe Replacement (LZE/LZ4/LZ8) .
  9. Install the air cleaner outlet duct. Refer to the following:
  10. IMPORTANT: It is recommended that the 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.
  11. Reset the TAP values. Refer to Transmission Adaptive Functions .