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Home >> GMC >> 2018 >> Acadia Denali, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 198 (Manual Transmission - TREMEC 6-Speed (M3L Mg9)) >> Repair Instructions - Off Vehicle >> Transmission Disassemble (MG9) >> Extension Housing Removal

Extension Housing Removal

WARNING: This page is about a different car, the 2017 Cadillac ATS. However, it is still accessible from the selected car via links, so may be relevant.
    Fig 1: Holding Fixture And Adapters
    GM4055387Courtesy of GENERAL MOTORS COMPANY
  1. Install the DT-47678  flange (2) and the DT-47678-10  flange adapter (3).
  2. Mount the transmission on a workbench using the J-3289-20  holding fixture (1).
  3. Rotate the transmission into a horizontal position.
  4. Remove the transmission drain plug and drain the transmission fluid.
  5. Shift the transmission into NEUTRAL (N).
    6. Fig 2: Shifter Cover Plate, Bolts And Gasket
    GM4055388Courtesy of GENERAL MOTORS COMPANY
  6. Remove the shifter cover plate bolts (3).
  7. Remove the shifter cover plate (2) and gasket (1).
    8. Fig 3: Holding Fixture, Propeller Shaft Transmission Yoke Nut And Washer
    GM4055391Courtesy of GENERAL MOTORS COMPANY
  8. Install the J-45012  holding fixture with the mounting bolts to the propeller shaft transmission yoke (3).
  9. Using a socket wrench, remove the propeller shaft transmission yoke nut (1).
  10. Remove the propeller shaft transmission yoke washer (2).
    11. Fig 4: Removing Propeller Shaft Transmission Yoke
    GM4055392Courtesy of GENERAL MOTORS COMPANY
  11. Using DT-45019  flange and pinion cage remover, remove the propeller shaft transmission yoke (1).
    12. Fig 5: Gear Position Sensor, Bolt And Gasket
    GM4055394Courtesy of GENERAL MOTORS COMPANY
  12. Remove the manual transmission gear position sensor bolt (1).
  13. Remove the manual transmission gear position sensor (2) and the manual transmission gear position sensor gasket (3).
    14. Fig 6: Transmission Gap Magnet And Bolt
    GM4055395Courtesy of GENERAL MOTORS COMPANY
  14. Remove the transmission gap magnet bolt (1) and the transmission gap magnet (2).
    15. Fig 7: Rear Extension Housing, Bolts, Nuts, Brackets And Gasket
    GM4055396Courtesy of GENERAL MOTORS COMPANY
  15. Remove the rear extension housing bolts (1), nuts (2), and the brackets (3, 4).
  16. Remove the extension housing (5) and transmission extension gasket (6).
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