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Home >> GMC >> 2018 >> Acadia Denali, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 85 (Manual Transmission - TREMEC 6-Speed (Mg9 M3L)) >> Repair Instructions - Off Vehicle >> Transmission Disassemble (MG9) >> Reverse Speed Gear Removal

Reverse Speed Gear Removal

WARNING: This page is about a different car, the 2016 Cadillac ATS. However, it is still accessible from the selected car via links, so may be relevant.
    Fig 1: Identifying Plug, Spring & Shift Detent Roller
    GM2102199Courtesy of GENERAL MOTORS COMPANY
  1. Remove the plug (1), spring (2), and shift detent roller (3).
  2. Fig 2: Identifying Shift Guide Rollpin, Shift Shaft Extension & Extension Housing Main Shaft Bearing Race
    GM2102200Courtesy of GENERAL MOTORS COMPANY
  3. Remove the shift guide rollpin (1).
  4. Remove the shift shaft extension (2).
  5. Remove the extension housing main shaft bearing race (3).
  6. Fig 3: Identifying Snap Ring, Speed Sensor Rotor & Locking Ball
    GM2102202Courtesy of GENERAL MOTORS COMPANY
  7. Remove the following parts in order:
    • The snap ring (1)
    • The speed sensor rotor (2)
    • The locking ball (3)
  8. Fig 4: Identifying Rear Bearing Retainer Ring, Spacers & Mainshaft Rear Roller Bearing
    GM2102203Courtesy of GENERAL MOTORS COMPANY
  9. Remove the rear bearing retainer ring (1).
  10. Remove the spacer (3).
  11. Remove the mainshaft rear roller bearing (2).
  12. Remove the spacer (3).
  13. Fig 5: Identifying Reverse Gear Components
    GM2102205Courtesy of GENERAL MOTORS COMPANY
  14. Remove the retainer ring (1).
  15. Remove the reverse gear thrust washer (2).
  16. Remove the reverse gear (3).
  17. Remove the reverse gear caged needle bearing (4).
  18. Remove the reverse gear blocking ring assembly (5), which includes the following components:
    1. Reverse drive gear inner cone (6)
    2. Reverse drive gear outer cone (7)
    3. Reverse gear blocking ring (8)