Extension Assemble (MG9)

Special Tools

• DT 48074  Input and Output Shaft Seal Installer
• DT 48802  Bearing Installer
• J 8092  Drive Handle
• J 21426  Outer Output Shaft Seal Installer
• J 36190  Universal Driver Handle
• J 39437  Bushing Installer
• J 39439-3  Rear Case Bushing Installer
• J 39546  Bearing Race Installer

For equivalent regional tools, refer to Special Tools .

Fig 1: Installing Reverse Rail Bushing
Courtesy of GENERAL MOTORS COMPANY
1. Using J 36190  handle (1) and J 39439-3  installer (2), install the reverse rail bushing.
Fig 2: Oil Funnel And Extension Housing Countershaft Bearing
Courtesy of GENERAL MOTORS COMPANY
2. Snap the oil funnel into a NEW extension housing countershaft bearing assembly.
3. Using the J 36190  handle (1) and DT 48802  installer (2), install the countershaft bearing.
Fig 3: Countershaft Rear Bearing Components
Courtesy of GENERAL MOTORS COMPANY
NOTE:

The plastic roller bearing cage (2) and bearings (3) are part of the countershaft bearing assembly.

4. Install the countershaft rear bearing retainer (1).
Fig 4: Installing Mainshaft Bearing Race
Courtesy of GENERAL MOTORS COMPANY
5. Install the mainshaft bearing race, using the J 39546  installer (1) and the J 8092  drive handle (2).
Fig 5: Installing Mainshaft Bearing Race Retainer Ring
Courtesy of GENERAL MOTORS COMPANY
6. Install the mainshaft bearing race retainer ring.
Fig 6: Output Shaft Seal
Courtesy of GENERAL MOTORS COMPANY
7. Install the NEW output shaft seal (1) using the J 8092  drive handle and the DT 48074  input/output Shaft installer.
Fig 7: Applying Sealant To Plug Threads
Courtesy of GENERAL MOTORS COMPANY
8. Apply sealer GM P/N 12346004 (Canadian P/N 10953480) or equivalent to the transmission case drain plug.
Fig 8: Transmission Case Drain Plug & Vehicle Speed Sensor
Courtesy of GENERAL MOTORS COMPANY
CAUTION:

Refer to Fastener Caution .

9. Install the transmission case drain plug (2) and tighten to 27 N.m (20 lb. ft).
10. Install the vehicle speed sensor (1).
11. Install the vehicle speed sensor bolt and tighten to 11 N.m (96 lb in).
Fig 9: Reverse Lockout Assembly
Courtesy of GENERAL MOTORS COMPANY
12. Install a NEW O-ring onto the reverse lockout assembly (1).
13. Install the reverse lockout assembly into the extension housing.
14. Install the reverse lockout assembly bolt and tighten to 18 N.m (13 lb ft).
Fig 10: Roller Bearing & Snap Ring
Courtesy of GENERAL MOTORS COMPANY
15. Install the roller bearing (2).
16. Install the snap ring (1).
Fig 11: Reverse Idler Gear Shaft
Courtesy of GENERAL MOTORS COMPANY
17. Install the reverse idler gear shaft (1).
Fig 12: Reverse Idler Gear And Roller Bearing
Courtesy of GENERAL MOTORS COMPANY
18. Install the roller bearing and reverse idler gear.
Fig 13: Applying Sealant To Reverse Idler Shaft Brackets Bolt Threads
Courtesy of GENERAL MOTORS COMPANY
19. Apply GM P/N 12345382, (Canadian P/N 10953489) or equivalent to the reverse idler shaft bracket bolt threads.
Fig 14: Reverse Idler Shaft Bracket & Bolts
Courtesy of GENERAL MOTORS COMPANY
20. Install the reverse idler shaft bracket and bolts. Tighten the bolts to 25 N.m (18 lb ft).