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Home >> Cadillac >> 2004 >> CTS Base, 3.2 N >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 6 (Automatic Transmission - 5L40-E (Introduction, Service & Replacement)) >> Repair Instructions >> Transmission Replacement (3.6L (LY7)) >> Removal Procedure

Removal Procedure

WARNING: This page is about a different variant/trim than selected.
    IMPORTANT: NEW torque converter bolts will be required each time the torque converter bolts are removed.
  1. Disconnect the negative battery cable. Refer to Battery Negative Cable Disconnect/Connect Procedure in Engine Electrical.
  2. Remove the thermostat housing to gain access to the upper transmission mounting bolts. Refer to Thermostat Housing Replacement (LA3, LY9) , Thermostat Housing Replacement (LY7) or Thermostat Housing Replacement (LS6) in Engine Cooling.
  3. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
  4. Drain the transmission fluid if disassembly of the transmission is necessary. Refer to Automatic Transmission Fluid/Filter Replacement .
    5. Fig 1: Identifying Shift Linkage
    GM785877Courtesy of GENERAL MOTORS CORP.
  5. Remove the transmission manual shift shaft nut.
  6. Disconnect the shift linkage from the transmission.
  7. Place the transmission in neutral by rotating the transmission shift shaft clockwise 2 clicks.
  8. Remove the exhaust system. Refer to Exhaust System Replacement (LA3, LY9) , Exhaust System Replacement (LY7) or Exhaust System Replacement (LS6) in Engine Exhaust.
    9. Fig 2: View Of Propeller Shaft Coupler
    GM801931Courtesy of GENERAL MOTORS CORP.
  9. Disconnect the propeller shaft coupler (1) from the transmission flange. Refer to Propeller Shaft Replacement (Automatic Transmission) , Propeller Shaft Replacement (Manual Transmission) or Propeller Shaft Replacement (CTS-V) in Propeller Shaft.
  10. Push the front propeller shaft toward the rear of the vehicle in order to release the propeller shaft coupler (1) from the transmission flange.
    11. Fig 3: Securing Front Propeller Shaft To Shift Control Lever With Mechanics Wire
    GM787650Courtesy of GENERAL MOTORS CORP.
  11. Secure the front propeller shaft (1) to the shift control lever (3) with a piece of mechanics wire (2).
    12. Fig 4: View Of Transmission Wiring Harness Connector & Locking Latch
    GM785868Courtesy of GENERAL MOTORS CORP.
  12. Disconnect the transmission wiring harness connector (1) from the transmission by rotating the locking latch (2) counterclockwise.
    13. Fig 5: Disconnecting Wiring Harness Clips From Transmission
    GM785869Courtesy of GENERAL MOTORS CORP.
  13. Disconnect the wiring harness clips from the transmission, and position the wiring harness aside.
    14. Fig 6: Removing Starter Motor
    GM887715Courtesy of GENERAL MOTORS CORP.
  14. Remove the starter motor to gain access to the torque converter bolts. Refer to Starter Motor Replacement (LA3, LY9) , Starter Motor Replacement (LY7) or Starter Motor Replacement (LS6) in Engine Electrical.
  15. Mark the torque converter to flexplate/flywheel orientation to ensure proper realignment.
    16. Fig 7: View Of Front Air Deflector And Push Pin retainers
    GM699902Courtesy of GENERAL MOTORS CORP.
  16. Remove the front air deflector. Refer to Air Deflector Replacement - Front in Body Front End.
  17. Repeat the following steps for all 3 torque converter bolts:
    1. Rotate the harmonic balancer center bolt clockwise ONLY, in order to align the torque converter bolt with the starter motor opening in the engine block.
    2. Remove and discard the torque converter bolt. The bolt is self locking and is NOT reusable.
  18. Place an oil drain pan under the transmission fluid cooler pipes.
    19. Fig 8: Removing Bolt Securing Transmission Fluid Cooler Pipes Brace
    GM785866Courtesy of GENERAL MOTORS CORP.
  19. Remove the bolt securing the transmission fluid cooler pipes brace to the engine.
    20. Fig 9: Disconnecting Fluid Cooler Pipes From Transmission
    GM785867Courtesy of GENERAL MOTORS CORP.
  20. Disconnect the fluid cooler pipes from the transmission.
  21. Plug the open outlet ports to prevent fluid loss and contamination.
  22. Position a suitable transmission jack under the transmission.
  23. Remove the transmission mount. Refer to Transmission Mount Replacement .
    24. Fig 10: Removing 3 Lower Transmission Mounting Bolts
    GM785862Courtesy of GENERAL MOTORS CORP.
  24. Remove the 3 lower transmission mounting bolts (1-2).
  25. Support the engine with a suitable jack. Loosen the two rear cradle bolts approximately one inch. Lower the engine and transmission just enough to gain access to the remaining 3 upper transmission mounting bolts.
    26. Fig 11: Disconnecting Engine Wiring Harness Retaining Clips
    GM785771Courtesy of GENERAL MOTORS CORP.
  26. Disconnect the engine wiring harness retaining clips (1) from the transmission mounting bolts.
    27. Fig 12: Removing 3 Upper Transmission Mounting Bolts
    GM785861Courtesy of GENERAL MOTORS CORP.
  27. Remove the 3 upper transmission mounting bolts (2-3).
  28. Pull the transmission free from the engine dowels (1).
    29. IMPORTANT: Ensure clearance is maintained between the transmission and the following:
    • The catalytic converters
    • The wiring harnesses
    • The cooler pipes
    • The propeller shaft
  29. Carefully lower the transmission from the vehicle.
  30. Flush the transmission oil cooler. Refer to Automatic Transmission Oil Cooler Flushing and Flow Test (J45096) or Automatic Transmission Oil Cooler Flushing and Flow Test (J35944 A) .
  31. If the transmission is being replaced, remove the drive flange and install it on the replacement unit. Refer to Drive Flange and Seal Replacement .
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