Mainshaft Disassembly, Inspection, and Reassembly

Mainshaft Disassembly, Inspection, and Reassembly

1. Remove the thrust needle bearing (A), mainshaft 5th gear (B), needle bearing (C), thrust needle bearing (D), mainshaft 5th gear collar (E), 4th/5th clutch (F), and O-rings (G) from the mainshaft (H).

2. Inspect the condition of the sealing rings (I). If the sealing rings are worn, distorted, or damaged, remove the set ring (J) and needle bearing (K), and replace the sealing rings with new ones.

3. Inspect the thrust needle bearing and needle bearing for wear and rough movement.

4. Inspect the splines for excessive wear and damage.

5. Inspect the 4th gear for wear and damage, and inspect the 4th gear bearing for wear and rough rotation.

6. Replace the mainshaft 4th gear (L) if the 4th gear is worn or damaged, or the bearing is worn or damaged.

7. Check the shaft bearing surfaces for scoring and excessive wear.

8. Lubricate all parts with ATF during reassembly.

9. Wrap the shaft splines with tape to prevent O-ring damage, install the new O-rings on the mainshaft, then remove the tape.

10. Install the 4th/5th clutch.

11. Install the mainshaft 5th gear collar, thrust needle bearing, needle bearing, mainshaft 5th gear, and thrust needle bearing.