Main Shaft Assemble (Gen 2)

Special Tools 

3-0207944  Main Shaft Tapered Bearing Insert Tool

For equivalent regional tools, refer to Special Tools .

Fig 1: 4th Gear Bearing Assembly
Courtesy of GENERAL MOTORS COMPANY
1. Install the 4th gear bearing assembly (1).
Fig 2: 3rd/4th Gear Assembly Components
Courtesy of GENERAL MOTORS COMPANY
NOTE:

The 3rd gear blocking ring lugs must be aligned with the 3rd/4th gear synchronizer assembly grooves.

NOTE:

The groove on the 3rd/4th gear synchronizer assembly (2) should point toward the 4th gear assembly.

2. Assemble the following components:
   • 3rd/4th gear synchronizer assembly (1)
   • 4th gear outer blocking ring (3)
   • 4th gear intermediate blocking ring (4)
   • 4th gear inner blocking ring (5)
   • 4th gear assembly (6)
Fig 3: 3rd/4th Gar Synchronizer Asembly & Insert Tool
Courtesy of GENERAL MOTORS COMPANY
3. Install the 3rd/4th gear synchronizer assembly (2) and the 4th gear assembly (1) as a unit using 3-0207944  bearing insert tool (3) and a hydraulic press.
Fig 4: 3rd/4th Gear Synchronizer Assembly Retaining Ring & Thrust Washer
Courtesy of GENERAL MOTORS COMPANY
4. Install the 3rd/4th gear synchronizer assembly thrust washer (2) and the NEW 3rd/4th gear synchronizer assembly retaining ring (1).
Fig 5: 2nd & 3rd Gear Components
Courtesy of GENERAL MOTORS COMPANY
5. Install the following components:
   • 3rd gear outer blocking ring (8)
   • 3rd gear intermediate blocking ring (7)
   • 3rd gear inner blocking ring (6)
   • 3rd gear bearing assembly (5)
   • 3rd gear assembly (4)
   • 3rd gear thrust washer (3)
   • 3rd gear thrust washer retaining ring (2)
   • 2nd gear bearing assembly (1)
Fig 6: 1st/2nd Gear Components
Courtesy of GENERAL MOTORS COMPANY
NOTE:

The lugs on the blocking rings must be aligned with the 2nd gear assembly and the 1st/2nd gear synchronizer assembly.

6. Assemble the following components:
   • 1st/2nd gear synchronizer assembly (1)
   • 1st/2nd gear outer blocking ring (2)
   • 1st/2nd gear intermediate cone ring (3)
   • 1st/2nd gear inner blocking ring (4)
   • 2nd gear assembly (5)
Fig 7: 1st/2nd Gear Synchronizer Assembly & Insert Tool
Courtesy of GENERAL MOTORS COMPANY
7. Install the 1st/2nd gear synchronizer assembly (2) and the 2nd gear assembly (1) as a unit using 3-0207944  bearing insert tool (3) and a hydraulic press.
Fig 8: 1st/2nd Gear Synchronizer Assembly Retaining Ring
Courtesy of GENERAL MOTORS COMPANY
8. Install the NEW 1st/2nd gear synchronizer assembly retaining ring (1).
Fig 9: 1st/2nd Gear Synchronizer Assembly Components
Courtesy of GENERAL MOTORS COMPANY
NOTE:

The lugs on the blocking rings must be aligned with the 1st/2nd gear synchronizer assembly grooves.

9. Install the following components:
   • 1st/2nd gear outer blocking ring (5)
   • 1st/2nd gear intermediate cone ring (4)
   • 1st/2nd gear inner blocking ring (3)
   • 1st gear bearing assembly (2)
   • 1st gear (1)
Fig 10: 1st/2nd Gear Thrust Washer & Install Tube
Courtesy of GENERAL MOTORS COMPANY
10. Install the 1st gear thrust washer (1) and the thrust washer (2) in the 1st/2nd gear synchronizer assembly using a suitable tube (3) and a hydraulic press.