GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Cadillac 🢒 2009 🢒 CTS 🢒 Transmission 🢒 Manual Transmission - Tremec 6-Speed 🢒 Extension Disassemble

Special Tools

    • DT 49216 Shift Rail Bearing Remover
    • J 23907 Slide Hammer with Bearing Adapter
    • J 26941 Bearing Race Remover
    • J 29369-2 Bushing and Bearing Remover - 2-3 in
    • J 36190 Universal Driver Handle
    • J 39431 Fifth/Sixth Driven Gear Puller
    • J 39439-1 Bushing Installer
    • J 39439-2 Shift Rail Bushing Remover
    • J 39439-3 Bushing Installer
    • J 45124 Removal Bridge
    • J 45124-9 Puller Leg

For equivalent regional tools, refer to Special Tools.


    Object Number: 1938442 Size: SH
  1. Remove the reverse idler shaft bracket bolts and bracket.

    2. Object Number: 1938443 Size: SH
  2. Remove the reverse idler gear and the roller bearing.

    3. Object Number: 2102276 Size: SH
  3. Remove the reverse idler gear shaft (1).

    4. Object Number: 1998736 Size: SH
  4. Remove the countershaft rear bearing retainer (1).

    5. Note: The plastic roller bearing cage (2) and bearings are part of the countershaft bearing assembly. Always use a new countershaft bearing assembly.

  5. Cut away the plastic roller bearing cage (2) from the countershaft bearing assembly.
  6. Remove the bearings (3). Discard the cage and bearings.

    7. Object Number: 1938445 Size: SH
  7. Install J 45124-1 removal bridge  (1), J 45124-9 puller leg  (2), and J 29369-2 remover  (3) in the race from the countershaft bearing assembly in the extension housing.
  8. Remove the race.

    9. Object Number: 1887608 Size: SH

    Note: The bearing race is part of the countershaft bearing assembly. Always use a new countershaft bearing assembly.

  9. Remove the oil funnel from the bearing race. Discard the bearing race.

    10. Object Number: 1938447 Size: SH
  10. Using J 39439-2 remover  (2) and J 23907 slide hammer  (1), remove the bushing.

    11. Object Number: 2102277 Size: SH
  11. Remove the output shaft seal.

    12. Pry out the seal with a suitable tool.


    Object Number: 2102278 Size: SH
  12. Remove the snap ring (1) and the roller bearing (2).

    13. Object Number: 2102279 Size: SH
  13. Remove the mounting bolt, the reverse lockout assembly (1) and the O-ring.

    14. Object Number: 2102281 Size: SH
  14. Remove the bolt and the vehicle speed sensor (1).
  15. Remove the plug (2).

    16. Object Number: 2107998 Size: SH
  16. Remove the mainshaft bearing race retainer ring.

    17. Object Number: 2108002 Size: SH

    Note: Do not replace the bearing race unless inspection shows bearing race damage.

  17. Place the extension housing on a flat work surface. Locate the oil clearance gap between the housing and the main shaft bearing race.
  18. Insert a brass drift through the mainshaft opening of the extension housing, into the oil clearance gap. Using a mallet, tap down on the drift to remove the mainshaft bearing race.

    19. Object Number: 2102282 Size: SH
  19. Remove the reverse rail bushing using the J 36190 handle  (1) and J 39439-2 installer  (2).

    20. Object Number: 2102283 Size: SH
  20. Remove the rear housing shift rail seal.

    21. Object Number: 2102284 Size: SH
  21. Remove the shift rail bearing using the J 23907 slide hammer  (1) and DT 49216 remover  (2).