Shift Shaft Assemblies and Gear Clusters Installation

1. Lubricate all components as assembly progresses, using DT-36850-A  transjel® lubricant.

2. Courtesy of GENERAL MOTORS COMPANY

   Install the input shaft (1) in the clutch housing.

NOTE:
• Ensure the tabs on the blocking ring align with the corresponding pockets in the synchronizer hub. Click video link above for reference.
• Ensure the rings are assembled concentric to the centerline of the input shaft, this will aid in the output shaft installation into the pocket of the input shaft.
3. Install the 4th gear blocking assembly:
   1. Install the 4th speed drive gear inner cone (4).
   2. Install the 4th speed drive gear outer cone (3).
   3. Install the 4th speed drive gear blocking ring (2).

4. Courtesy of GENERAL MOTORS COMPANY

   NOTE:

   In order for the shift forks to properly line up with the synchronizers, the shift shaft assembly must be assembled correctly. Shift Shaft and Fork Assemblies Assemble (MM6) 

   Assemble the shift shaft to the mainshaft.

5. Install the mainshaft and the shift shaft assembly into the clutch housing.

6. Courtesy of GENERAL MOTORS COMPANY

   Install the countershaft assembly using the following sequence:

   1. Lift up the mainshaft assembly enough in order to install the countershaft assembly.
   2. Install the countershaft assembly.
   3. Lift the mainshaft assembly enough in order to rotate the input shaft to engage the synchronizer keys with 4th gear blocking ring.

7. Courtesy of GENERAL MOTORS COMPANY

   Install the 5th/6th and the reverse shift shaft.

   Align the slots of the shift shaft levers with the interlock plate.

Oil Filter Installation 

Courtesy of GENERAL MOTORS COMPANY

Install the oil filter assembly (1).