Mainshaft

1. Snap ring
2. Main drive gear bearing and adjustment shim
3. Countershaft front bearing and adjustment shim
4. Countershaft center bearing
5. Mainshaft front bearing
6. Countershaft
7. Countershaft center bearing inner race
8. Countershaft front bearing spacer
9. Main drive gear
10. Synchronizer ring (4th)
11. Bearing
12. Thrust washer
13. 1st gear
14. Inner race
15. Synchronizer ring (1st)
16. Snap ring
17. Clutch hub assembly (3rd/4th)
18. Synchronizer ring (3rd)
19. Bearing
20. 3rd gear
21. Clutch hub assembly (1st/2nd)
22. Synchronizer ring (2nd)
23. 2nd gear
24. Mainshaft
25. 3rd/4th shift fork
26. 1st/2nd shift fork
27. Transmission case

Disassemble in the order shown in the image, referring to Disassembly Note.

Disassembly note




Snap ring

CAUTION: Do not reuse the snap ring.

Remove the snap rings.




Main drive gear bearing
1. Install the SST between the 4th gear synchronizer ring and synchromesh gear on the main drive gear.




2. Turn the bearing snap rings so that the ends are 90° to the case grooves.




3. Remove the main drive gear bearing with the SST.




Countershaft front bearing
1. Turn the bearing snap rings so that the ends are 90° to the case grooves.

NOTE: Replace the countershaft front bearing and countershaft front spacer as one assembly.




2. Remove the countershaft front bearing with the SST.




Mainshaft front bearing
Remove the mainshaft front bearing with the SST.




Countershaft
1. Remove the countershaft center bearing with the SST.




2. Remove the countershaft.




Mainshaft and gear assembly
1. Remove the main drive gear from the transmission case.




2. Remove the mainshaft and gear assembly from the transmission case.




3rd/4th clutch hub assembly

CAUTION: Do not reuse the snap ring.

1. Remove the snap ring from the front of the mainshaft.




2. Position the SST between 2nd and 3rd gears.

CAUTION: Hold the mainshaft with one hand so that it does not fall.

3. Press the mainshaft out of 3rd gear and 3rd/4th clutch hub assembly.




1st/2nd clutch hub assembly

CAUTION: Hold the mainshaft with one hand so that it does not fall.

Press the 1st/2nd clutch hub assembly and 1st gear sleeve from the mainshaft.




Countershaft center bearing inner race

CAUTION: Hold the countershaft with one hand so that it does not fall.

NOTE: Replace the countershaft center bearing and countershaft center bearing inner race as one assembly.

Remove the inner race of the countershaft center bearing from the countershaft with the SST.




Countershaft front bearing spacer

NOTE: Replace the countershaft front bearing and counter- shaft front bearing spacer as one assembly.




1. Position the SST between the countershaft front bearing spacer and countershaft.

CAUTION: Hold the countershaft with one hand so that it does not fall.

2. Press the countershaft out front the countershaft front bearing spacer.