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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) >> Reverse Speed Gear Removal

Reverse Speed Gear 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: 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: Shift Guide Rollpin, Shift Shaft Extension And Extension Housing Main Shaft Bearing Race
    GM2102200Courtesy of GENERAL MOTORS COMPANY
  2. Remove the shift guide rollpin (1).
  3. Remove the shift shaft extension (2).
  4. Remove the extension housing main shaft bearing race (3).
    5. Fig 3: Snap Ring, Speed Sensor Rotor And Locking Ball
    GM2102202Courtesy of GENERAL MOTORS COMPANY
  5. Remove the following parts in order:
    • The snap ring (1)
    • The speed sensor rotor (2)
    • The locking ball (3)
    6. Fig 4: Rear Bearing Retainer Ring, Spacers And Mainshaft Rear Roller Bearing
    GM2102203Courtesy of GENERAL MOTORS COMPANY
  6. Remove the rear bearing retainer ring (1).
  7. Remove the spacer (3).
  8. Remove the mainshaft rear roller bearing (2).
  9. Remove the spacer (3).
    10. Fig 5: Reverse Gear Components
    GM2102205Courtesy of GENERAL MOTORS COMPANY
  10. Remove the retainer ring (1).
  11. Remove the reverse gear thrust washer (2).
  12. Remove the reverse gear (3).
  13. Remove the reverse gear caged needle bearing (4).
  14. 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)
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