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Home >> Cadillac >> 2007 >> CTS V >> Repair and Diagnosis >> External Pages >> Different car >> Section 598 (Automatic Transmission - 6L50/6L80 - Removal & Installation, Service, Overhaul, Troubleshooting & Diagnosis) >> Repair Instructions - On Vehicle >> Transmission Replacement (6L50 All Wheel Drive) >> Removal Procedure

Removal Procedure

WARNING: This page is about a different car, the 2009 Cadillac STS. However, it is still accessible from the selected car via links, so may be relevant.
  1. Remove the thermostat housing. Refer to ENGINE COOLANT THERMOSTAT HOUSING REPLACEMENT (LY7) , or ENGINE COOLANT THERMOSTAT HOUSING REPLACEMENT (V6) , or ENGINE COOLANT THERMOSTAT HOUSING REPLACEMENT (LC3) , or ENGINE COOLANT THERMOSTAT HOUSING REPLACEMENT (LH2) .
  2. Remove the exhaust system. Refer to Exhaust System Replacement .
  3. Remove the catalytic converters. Refer to CATALYTIC CONVERTER REPLACEMENT - LEFT SIDE and CATALYTIC CONVERTER REPLACEMENT - RIGHT SIDE .
  4. Remove the front and rear propeller shaft. Refer to FRONT PROPELLER SHAFT REPLACEMENT and Rear Propeller Shaft Replacement (AWD) or Rear Propeller Shaft Replacement (RWD) .
    5. Fig 1: View Of Manual Shift Shaft Nut
    GM1827761Courtesy of GENERAL MOTORS CORP.
  5. Disconnect the shift linkage from the transmission.
    6. Fig 2: View Of Retainers
    GM1850371Courtesy of GENERAL MOTORS CORP.
  6. Disconnect the transmission wiring harness connector (5) from the transmission by releasing the locking mechanism and rotating the latch counterclockwise.
  7. Disconnect the wiring harness retainers (4) from the transmission.
  8. Remove the transmission vent hose from the retaining clips (6) on the transmission mount assembly.
  9. Remove the oxygen sensor wiring harness retainer from the transmission.
  10. Place an oil drain pan under the transmission fluid cooler pipes.
    11. Fig 3: View of TOC Line To Transmission Retainer Bolt
    G00669089Courtesy of GENERAL MOTORS CORP.
  11. Remove the transmission fluid cooler pipes from the transmission, and position aside. Refer to Transmission Fluid Cooler Pipe Replacement - Rear .
  12. Remove and discard the O-rings. Do NOT reuse the O-rings.
  13. Plug the open outlet ports to prevent fluid loss and contamination.
    14. Fig 4: View Of Torque Converter Bolt Close Out Cover
    G00669085Courtesy of GENERAL MOTORS CORP.
  14. Remove the transmission close out plug (1).
  15. Mark the torque converter to flexplate/flywheel orientation to ensure proper realignment.
  16. Remove the starter motor. Refer to STARTER MOTOR REPLACEMENT (LH2) , or STARTER MOTOR REPLACEMENT (LC3) , or STARTER MOTOR REPLACEMENT (LY7 AND LLT)
    17. Fig 5: Identifying Torque Converter Bolts
    G00669081Courtesy of GENERAL MOTORS CORP.
  17. Repeat the following steps for all torque converter bolts (1):
    1. Rotate the harmonic balancer center bolt clockwise ONLY, in order to align the torque converter bolt with the access hole.
    2. Remove and discard the torque converter bolt.
    18. Fig 6: View Of Intermediate Shaft Lower Pinch Bolt
    GM907425Courtesy of GENERAL MOTORS CORP.
  18. Disconnect the intermediate shaft from the power steering gear. Refer to Steering Gear Replacement .
    19. Fig 7: View Of Body Mounting Bolts
    GM1850365Courtesy of GENERAL MOTORS CORP.
  19. Support the transmission with a suitable transmission jack.
  20. Remove the transmission mount assembly. Refer to Transmission Mount Replacement (All Wheel Drive)  or Transmission Mount Replacement (Rear Wheel Drive) .
  21. Support the rear of the front frame with adjustable jack stands.
  22. Remove the bolts at the rear of the front frame.
  23. Loosen the bolts at the front of the front frame two turns but do NOT remove the bolts.
  24. Lower the rear of the front frame and the transmission.
    25. Fig 8: Transmission Vent Hose Retainers
    GM1850371Courtesy of GENERAL MOTORS CORP.
  25. Lower the transmission and remove the vent hose (2) from the vent tube.
  26. Position the wire harness and vent tube aside.
    27. Fig 9: Transfer Case
    G00669077Courtesy of GENERAL MOTORS CORP.
  27. Remove the transfer case. Refer to TRANSFER CASE ASSEMBLY REPLACEMENT .
  28. Remove the transmission mounting bolts (1-6).
  29. Pull the transmission free from the engine dowels.
    NOTE:
    • The wiring harness
    • The vent tube
    • The cooler pipes
  30. Carefully lower the transmission from the vehicle.
  31. Flush the transmission oil cooler if necessary. Refer to Transmission Fluid Cooler Flushing and Flow Test .
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