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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 (6L80) >> Installation Procedure

Installation 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.
    NOTE: Ensure clearance is maintained between the transmission and the following:
    • The starter drive nose cone
    • The catalytic converters
    • The oxygen sensors
    • The wiring harnesses
    • The cooler pipes
  1. Using the transmission jack, carefully raise the transmission to meet the engine.
    2. Fig 1: Identifying Transmission Mounting Bolts
    GM1850360Courtesy of GENERAL MOTORS CORP.
  2. Align the transmission with the engine dowels.
  3. Install the left side transmission mounting bolts. Do not tighten at this time.
    4. Fig 2: Identifying Transmission Mounting Bolts
    GM1644591Courtesy of GENERAL MOTORS CORP.
  4. Install the right side transmission mounting bolts.
    5. CAUTION: Refer to Fastener Caution .
  5. Tighten the right and left side transmission mounting bolts to 50 N.m (37 lb ft).
    6. Fig 3: Identifying Transmission Vent Hose Retaining Clips
    GM1645250Courtesy of GENERAL MOTORS CORP.
  6. Remove the support stand from under the engine oil pan.
  7. Using the transmission jack. Lower the engine and transmission assembly only enough to gain access to the vent hose tube.
  8. Install the vent hose (5) to the vent tube.
  9. Position the engine wiring harness to the original location.
  10. Raise the transmission to the installed position.
    11. Fig 4: View Of Transmission Mounting Bolts
    GM1649726Courtesy of GENERAL MOTORS CORP.
  11. Install the transmission mount assembly. Refer to Transmission Mount Replacement (All Wheel Drive)  or Transmission Mount Replacement (Rear Wheel Drive) .
  12. Remove the transmission jack.
  13. Align the torque converter to flexplate/flywheel orientation marks made during the removal procedure.
    14. Fig 5: Identifying Torque Converter Bolts
    GM1644597Courtesy of GENERAL MOTORS CORP.
    NOTE: Torque converter bolts are self locking and must be replaced with NEW torque converter bolts every time the bolts are removed.
  14. Complete 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 holes in the flexplate/flywheel with the access hole in the engine block.
    2. To aid in alignment of the torque converter to the flexplate/flywheel. Install all 3 NEW torque converter bolts before fully tightening.

      Tighten the torque converter bolts to 63 N.m (46 lb ft).

    15. Fig 6: View Of Torque Converter Bolt Close Out Cover
    GM830376Courtesy of GENERAL MOTORS CORP.
  15. Install the torque converter bolt close out cover to the engine block.
  16. Install the transmission close out plug.
    17. Fig 7: View of TOC Line To Transmission Retainer Bolt
    GM1710028Courtesy of GENERAL MOTORS CORP.
  17. Place NEW O-rings over the transmission fluid cooler pipes.
  18. Install the transmission fluid cooler pipes to the transmission. Refer to Transmission Fluid Cooler Pipe Replacement - Rear .
  19. Install the transmission fluid cooler lines to the cooler line retainer bracket.
  20. Install the front air deflector. Refer to Front Air Deflector Replacement .
    21. Fig 8: Transmission Vent Hose Retaining Clips
    GM1645250Courtesy of GENERAL MOTORS CORP.
  21. Install the transmission vent hose to the retaining clips (1, 2) on the transmission mount assembly.
  22. Install the wiring harness retainers (7, 9) to the transmission.
  23. Connect the transmission wiring harness connector (8) to the transmission by rotating the locking latch clockwise.
    24. Fig 9: View Of Manual Shift Shaft Nut
    GM1841192Courtesy of GENERAL MOTORS CORP.
  24. Install the shift linkage to the transmission. Refer to Transmission Control Replacement .
  25. Install the propeller shaft. Refer to Rear Propeller Shaft Replacement (AWD) or Rear Propeller Shaft Replacement (RWD) .
  26. Install the exhaust system. Refer to Exhaust System Replacement .
  27. Lower the vehicle.
    28. Fig 10: Transmission Mounting Bolts
    GM1644605Courtesy of GENERAL MOTORS CORP.
  28. Install the top two transmission mounting bolts (1) and tighten to 50 N.m (37 lb ft).
    29. Fig 11: Identifying Wire Harness Bracket
    GM1644602Courtesy of GENERAL MOTORS CORP.
  29. Install the wire harness (1) to the wire harness bracket.
    30. Fig 12: View of Rear Section Of Supercharger Inlet Duct
    GM1652890Courtesy of GENERAL MOTORS CORP.
  30. Install the front and rear sections of the supercharger inlet duct assembly. Refer to Supercharger Inlet Duct Assembly Replacement .
  31. Check the transmission fluid level and fill if necessary. Refer to Transmission Fluid Check .
  32. Adjust the shift control linkage. Refer to Shift Control Linkage Adjustment (All Wheel Drive)  or Shift Control Linkage Adjustment (Rear Wheel Drive) .
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