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MANUAL TRANSMISSIONS
78-35
SCREWDRIVER,
CAUTION: Be sure the notches of the blocker
ring align with the keys o f the synchronizer
assembly.
8. Install synchronizer hub to mainshaft snap ring (Fig.
7B-38).
9. Install a blocker ring with notches downward so they
align with the keys of the 1-2 synchronizer assembly.
10. Install first gear with clutching teeth downward.
1 1. Install first gear thrust washer (steel).
12. Install first gear spring washer.
13. Install rear ball bearing with snap ring slot
downward; reverse and press onto mainshaft (Fig. 7B-45).
14. Install rear bearing to mainshaft snap ring (Fig. 7B-
36).
15. Install speedometer drive gear and clip.
Fig. 7 8 - 4 2 Removing Bearing Retainer Oil seal
ASSEMBLY OF TRANSMISSION
1. Using Tool J 22246, load a row of roller bearings (27)
and a bearing thrust washer at each end of the countergear.
Use heavy grease to hold them in place (Fig. 7B-46).
2. Place countergear assembly through case rear opening
along with a tanged thrust washer (tang away from gear) at
each end and install countergear shaft and woodruff key from
rear of case.
C A U T I 0 N
:
Be sure countershaft picks up both
thrust washers and that the tangs are aligned with
their notches in the case.
3. Install reverse idler gear and shaft with its woodruff
key from the rear of case.
Fig. 7 8 - 4 3 Installing Bearing Retainer Oil Seal
3. Install the 3rd and 4th synchronizer assembly with the
fork slot downward; push assembly onto splines on the
mainshaft until it bottoms out against flange.
C AUTI 0 N: Be sure the notches o f the blocker
ring align with the keys o f the synchronizer
assembly.
4. Install synchronizer hub to mainshaft snap ring. Both
synchronizer snap rings are identical.
Turn the rear of the mainshaft upward. Install the
following components on the mainshaft:
5. Install the second speed gear with clutching teeth
upward; the front face of the gear will butt against the flange
on the mainshaft.
6. Install a blocker ring with clutching teeth downward
over synchronizing surface of the second speed gear.
7. Install the first and second synchronizer assembly
with fork slot downward.
4. Using snap ring pliers, expand the snap ring in the
extension and assembly extension over rear of mainshaft and
onto rear bearing (Fig. 7B-32). Seat snap ring in rear bearing
groove.
5. Load the mainshaft pilot bearings (14) into the drive
gear cavity and assemble the 4th speed blocker ring onto the
drive gear clutching surface with its clutching teeth toward
the gear (Fig. 7B-47).
6. Pilot the drive gear, pilot bearings and 4th speed
blocker ring assembly over the front of the mainshaft
assembly. Do not assemble bearing to gear yet.
C AUTI 0 N: Be sure the notches in the blocker
ring align with the keys in the 3-4 synchronizer
assembly.
7. Place extension to case gasket at rear of case holding
in place with grease and, from the rear of the case, assemble
the clutch gear, mainshaft and extension to case as an
assembly.
8. Install extension to case retaining bolts, using seal
cement on bottom bolt only. Torque bolts to 45 lb. ft.
9. Install front bearing outer snap ring to bearing and
position bearing over stem of drive gear and into front case
bore.
10. Install snap ring to drive gear stem and drive bearing
retainer and gasket to case, torquing bolts to 22 lb. ft.
NOTE: The retainer oil return hole should be at the
bottom.
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