Muncie CH & SM-465 4 Speed

1. Mount transmission in suitable holding fixture and remove transmission cover. If required, insert two 5/16 x 18 screws in cover flange threaded holes and turn evenly to raise cover dowel pins from case.

NOTE: Move reverse shifter fork so that reverse idler gear is partially engaged before attempting to remove cover. Forks must be positioned so rear edge of the slot in the reverse fork is in line with the front edge of the slot in the forward forks as viewed through tower opening.

2. Place transmission in two gears at once to lock gears and remove universal joint flange nut, universal joint from flange and brake drum assembly.

3. Remove parking brake and brake flange plate assembly on models so equipped.

4. Remove rear bearing retainer and gasket.

5. Slide speedometer drive gear off mainshaft.

6. Remove clutch gear bearing retainer and gasket.

7. Remove countergear front bearing cap and gasket.

8. Pry countergear front bearing out by inserting screw drivers into groove at cast slots in case.

9. Remove countergear rear bearing retaining rings from shaft and bearing. With a suitable tool remove countergear rear bearings. This will allow countergear assembly to rest on bottom of case.

10. Remove clutch gear bearing outer race to case retaining ring.

11. Remove clutch gear and bearing by tapping gently on bottom side of clutch gear shaft and prying directly opposite against the case and bearing snap ring groove at the same time. Remove 4th gear synchronizer ring.

CAUTION: Index cut out section of clutch gear in down position with countergear to obtain clearance for removing clutch gear.

12. Remove rear mainshaft bearing snap ring and using a suitable tool remove bearing from case. Slide 1st speed gear thrust washer off mainshaft.

13. Raise rear of mainshaft assembly and push rearward in case bore, then swing front end up and lift from case. Remove synchronizer cone from shaft.

14. Slide reverse idler gear rearward and move countergear rearward until front end is free of case, then lift to remove from case.

15. To remove reverse idler gear, drive reverse idler gear shaft out of case from front to rear using a drift. Remove reverse idler gear from case.