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Home >> Buick >> 2015 >> Regal GS, AWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 5 (Automatic Transmission - 6T40 - Repair Instructions - On Vehicle) >> Repair Instructions - On Vehicle >> Transmission Replacement >> Removal Procedure

Removal Procedure

WARNING: This page is about a different variant/trim than selected.
  1. Remove the battery tray. Refer to Battery Tray Replacement .
  2. Remove the transmission range select lever cable and bracket from the transmission.
  3. Drain the transmission fluid. Refer to Transmission Fluid Drain and Fill .
    4. Fig 1: Identifying Control Valve Body Transmission Control Module (TCM) Electrical Connector
    GM1999448Courtesy of GENERAL MOTORS COMPANY
  4. Disconnect the control valve body transmission control module (TCM) electrical connector (1) then unclip the connector from the transmission.
    5. Fig 2: Identifying Cooler Inlet & Outlet Hoses
    GM1998666Courtesy of GENERAL MOTORS COMPANY
  5. Remove the transmission fluid cooler inlet (1) and outlet (5) hoses from the retainer (2) on the control valve body cover.
  6. Remove the transmission fluid cooler inlet hose nut (3) from the transmission.
  7. Remove the transmission fluid cooler inlet hose (1) from the transmission.
  8. Remove the transmission fluid cooler outlet hose nut (4) from the transmission.
  9. Remove the transmission fluid cooler outlet hose (5) from the transmission.
  10. Plug and/or cap the hose and transmission to prevent contamination.
    11. Fig 3: Identifying Transmission-To-Engine Bolts
    GM1998673Courtesy of GENERAL MOTORS COMPANY
  11. Remove the upper transmission to engine bolts (2).
  12. Remove the frame. Refer to Drivetrain and Front Suspension Frame Replacement .
  13. Disconnect the left wheel drive shaft from the transmission. Refer to Front Wheel Drive Shaft Replacement (GNB/GNA) .
  14. Remove the intermediate drive shaft. Refer to Front Wheel Drive Intermediate Shaft Replacement (with MR6) .
  15. Remove the rear transmission mount from the transmission. Refer to Transmission Rear Mount Replacement .
  16. Remove the front transmission mount from the transmission. Refer to Transmission Front Mount Replacement .
    17. Fig 4: Identifying Starter Bolts
    GM2001293Courtesy of GENERAL MOTORS COMPANY
  17. Remove the starter. Refer to Starter Replacement (LEA, LUK) .
  18. Mark the relationship of the flywheel to the torque converter for reassembly.
  19. Remove the torque converter to flywheel bolts (1).
  20. Lower the vehicle.
  21. Remove the three left transmission mount bolts from the transmission. Refer to Transmission Mount Replacement - Left Side .
  22. Lower the transmission side with the support fixture to allow clearance for removal.
  23. Unclip the engine wiring harness from the transmission.
  24. Raise the vehicle.
  25. Use a transmission jack in order to support the transmission.
    26. Fig 5: Identifying Transmission-To-Engine Bolts
    GM1998673Courtesy of GENERAL MOTORS COMPANY
  26. Remove the remaining transmission fasteners (1,3,4).
    27. NOTE:

    Insure the torque converter remains securely in place on the transmission input shaft while separating and removing the transmission.

  27. Separate the transmission from the engine.
  28. Lower the transmission with the transmission jack far enough to remove the transmission.
  29. Flush and flow test the transmission oil cooler and lines. Refer to Transmission Fluid Cooler Flushing and Flow Test (6T30) .
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