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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 - On Vehicle >> Shift Control Assembly Replacement (MG9) >> Removal Procedure

Removal Procedure

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: Transmission Control Lever Boot And Shift Knob Fastener
    GM4167934Courtesy of GENERAL MOTORS COMPANY
  1. Remove the shift control knob. Refer to Transmission Control Lever Knob Replacement 
  2. Place the shifter in the Neutral position.
  3. Remove the front floor console trim plate. Refer to Front Floor Console Trim Plate Replacement
  4. Remove the upper shifter closeout boot from the lower closeout boot.
    5. Fig 2: Shift Control Assembly Fasteners
    GM4257747Courtesy of GENERAL MOTORS COMPANY
  5. Remove the 4 fasteners (1) securing the shift control assembly to the tunnel reinforcement.
    6. Fig 3: Closeout Boot
    GM4168472Courtesy of GENERAL MOTORS COMPANY
  6. Push the tabs on the closeout boot (1) inward and down to clear the body structure.
  7. Raise the vehicle. Refer to Lifting and Jacking the Vehicle (ATS-V)
  8. Remove the propeller shaft. Refer to Two-Piece Propeller Shaft Replacement (LF4)
    9. Fig 4: Shift Linkage Pin And Retaining Clip
    GM4032059Courtesy of GENERAL MOTORS COMPANY
  9. Remove the shift linkage retaining clip (1).
  10. Remove the shift linkage pin (3).
  11. Support the transmission with a suitable jack.
    12. Fig 5: Transmission Support Fasteners
    GM2243401Courtesy of GENERAL MOTORS COMPANY
  12. Remove the 4 fasteners (2) securing the transmission support. Refer to Transmission Support Replacement (Manual)
  13. Lower the transmission assembly to gain access to the top of the transmission.
    14. Fig 6: Transmission Boss, Shift Control Rod Pin & Retaining Tab
    GM3631969Courtesy of GENERAL MOTORS COMPANY
  14. Using a suitable flat-blade tool, release the left side shift control rod pin retaining tab (1), while sliding the pin outward. The pin will lock again at the outer transmission boss (3). Using a suitable flat-blade tool, insert the tool between the boss (3) and the rubber mount on the shift control assembly to release the shift control rod pin retaining tab to slide it further out of the transmission boss. Reposition the transmission slightly to allow extra clearance to completely remove the pin.
    15. Fig 7: Right Side Shift Control Rod Pin Retaining Tab
    GM3631979Courtesy of GENERAL MOTORS COMPANY
  15. Using a suitable flat-blade tool, release the right side shift control rod pin retaining tab (1), while sliding the pin outward. The pin will lock again at the outer transmission boss. Using a suitable flat-blade tool, insert the tool between the boss and the rubber mount on the shift control assembly to release the shift control rod pin retaining tab to slide it further out of the transmission boss. Reposition the transmission slightly to allow extra clearance to completely remove the pin.
  16. Remove the shift control assembly from the transmission.
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