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Home › Cadillac › 2003 › Seville SLS › Repair and Diagnosis › Transmission › Automatic Trans › Automatic Transaxle - 4T80-E › Repair Instructions › Lower Valve Assembly Replacement › Removal Procedure

Removal Procedure

  1. Remove the bottom pan and seal, scavenge screens, and the lip seals. Refer to SCAVENGE SCREENS AND SEALS REPLACEMENT   .
  2. Remove the bolts from the oil transfer plate and the wire harness extension retaining clip.
  3. Remove the oil transfer plate.
    Fig 1: Removing Oil Transfer Plate & Bolts
    G02177995Courtesy of GENERAL MOTORS CORP.
  4. Disconnect the wire harness extension from the wire harness assembly.
    Fig 2: Disconnecting Wire Harness Extension From Wire Harness Assembly
    G02177996Courtesy of GENERAL MOTORS CORP.
    IMPORTANT: Do not reuse the retainer (2), it must be replaced.
  5. Use a small screwdriver in order to disconnect the manual valve link retainer (2) from the manual valve link (3).
    IMPORTANT: Do not pry the internal mode switch assembly.
  6. Remove the manual valve link (3) from the inside detent lever (1).
    Fig 3: Removing Manual Valve Link From Inside Detent Lever
    G02177997Courtesy of GENERAL MOTORS CORP.
  7. Remove the two nuts and fourteen bolts from the lower valve assembly.
  8. Remove the lower valve assembly (consisting of the channel plate, control valve body, accumulator assembly, and wire harness extension) from the transaxle case as a single unit.
    Fig 4: Removing Lower Valve Assembly & Bolts
    G02177998Courtesy of GENERAL MOTORS CORP.
  9. For disassembly of the lower control valve body assembly.
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