Muncie CH & SM-465 4 Speed

1. Lower countergear into case until it rests on bottom.

2. Place reverse idler gear in transmission case with gear teeth toward the front. Install idler gear shaft from rear to front, being careful to have slot in end of shaft facing down. Shaft slot face must be at least flush with case.





3. Install mainshaft assembly into case with rear of shaft protruding out rear bearing hole in case. Position Tool J-22874-5 in clutch gear case opening and engaging front mainshaft. Rotate case onto front end.

NOTE: Install 1st speed gear thrust washer on shaft if not previously installed.

4. Install snap ring on bearing O.D. and position rear mainshaft bearing on shaft. Using Tool J-22874-1 drive bearing onto shaft and into case. Align tangs on snap ring with lube slot of case and slot in tool before driving bearing. Rotate case and remove Too J-22874-5.

5. Install synchronizer cone on pilot end of mainshaft and slide rearward to clutch hub.

CAUTION: Make sure three cut-out sections of 4th speed synchronizer cone align with three clutch keys in clutch assembly.

6. Install snap ring on clutch gear bearing O.D. Index cut-out portion of clutch gear teeth to obtain clearance over countershaft drive gear teeth and install clutch gear assembly into case. Raise mainshaft to get clutch gear started and tap bearing outer race with plastic tip hammer.

7. Install clutch gear bearing retainer using a new gasket. Tighten bolts to 15-18 ft. lbs.





8. Install Tool J-22874-2 in countergear front bearing opening in case to support countergear and rotate case onto front end.





9. Install snap ring on countergear rear bearing O.D., position bearing on countergear and using Tool J-22874-1, drive bearing into place. Rotate case and install snap ring on counter-shaft at rear bearing, then remove tool.

10. Tap countergear front bearing assembly into case.

11. Install countergear front bearing cap and gasket.

12. Slide speedometer drive gear over mainshaft to bearing.

13. Install rear bearing retainer and new gasket. Be sure snap ring ends are in Wube slot and cut-out in bearing retainer. Install bolts and tighten to 15-18 ft. lbs. Install brake backing plate on models equipped with propeller shaft brake.

14. Install parking brake drum and/or universal joint flange.

NOTE: Apply light coat of oil to seal surface.

15. Lock transmission in two gears at once. Install universal joint flange locknut and tighten to 90-120 ft. lbs.

16. Move all transmission gears to neutral except the reverse idler gear which should be engaged approximately 3/8 of an inch (leading edge of reverse idler gear taper lines up with front edge of 1st speed gear). Install cover assembly. Shifting forks must slide into their proper positions on clutch sleeves and reverse idler gear. Forks must be positioned as in removal.

17. Install cover bolts and tighten to 20-25 ft. lbs.