Transmission-Assemble - Pontiac tempest 1968 Service Manual

FOUR SPEED M U N C I E M A N U A L TRANSMISSION 7D-11
alignment of the bushings and their shafts, as well
as proper meshing of the gears. Because of the high
degree of accuracy to which these parts are ma­
chined, the bushings are not serviced separately.
2. Check bushings for excessive wear by using a
narrow feeler gauge between the shaft and the bush­
ing or use a micrometer. The proper clearance is
from .003" to .005".
TRANSMISSION—ASSEMBLE
ASSEMBLE MAINSHAFT
1. From the rear of mainshaft, assemble the sec­
ond speed gear (with hub of gear toward rear of
shaft).
2. Install 1-2 synchronizer clutch assembly to
mainshaft (sliding clutch sleeve taper toward the
rear, hub to the front), together with a synchronizing
ring on either side so their keyways line up with the
clutch keys (Fig. 7D-19).
F i g . 7 D - 1 9 Installing First Speed Synchronizing Ring
3. Press first gear sleeve onto mainshaft, using a
1-3/4" I.D. pipe cut to convenient length.
4. Install the first speed gear (with hub toward
front) and, using a 1-5/8" I.D. pipe cut to a suitable
length, press on the rear bearing (snap ring groove
toward front of transmission). Firmly seat the bear­
ing (Fig. 7D-20).
SNAP RING
G R O O V E
1
F i g . 7 D - 2 0 Installing Rear Bearing
5. Choose the correct selective fit snap ring
(.087", .090", .093" or .096") and install it in the
groove in mainshaft behind rear bearing. With prop­
er ring, maximum distance between snap ring and
rear face of bearing will be from zero to .005".
NOTE: Always use new snap rings when reas­
sembling transmission and do not expand the snap
ring further than is necessary for assembly.
6. Install the third speed gear (hub to front of
transmission) and the third speed gear synchronizing
ring (notches to front of transmission).
7. Install the third and fourth speed gear clutch
assembly (hub and sliding sleeve) with bolt sleeve
taper and hub toward front, making sure keys in hub
correspond to notches in the third speed gear syn­
chronizing ring.
8. Install snap ring in groove in mainshaft in front
of the third and fourth speed clutch assembly, with
ends of snap ring seated behind spline teeth.
9. Install the rear bearing retainer (Fig. 7C-21).
Spread the snap ring in the retainer to allow the snap
ring to drop around the rear bearing. Press on the
end of the mainshaft until snap ring engages groove
in the rear bearing.
10. Install the reverse gear (shift collar to rear).
11. Place speedometer gear retainer in output
shaft.
12. Align slot in speedometer drive gear with r e ­
tainer clip and slide gear into place.