Chevrolet 70 1969 Series, Shop Manual

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TRANSMISSION AND CLUTCH7-5
F ig u re 4 — T ra n sm is sio n C o n tro l C o v e r R e m o v e d
1. Reverse Shift Rail
2. 4th ana 5th Speed
Shift Fork
3. Reverse Shift Lug
Assembly
4. Control Cover
5. Reverse Shift Fork
6
.
Expansion Plugs
7. 1st Speed Shift Fork
8. 2nd and 3rd Speed
Shift Fork
9. Lock Pins
10. 2nd and 3rd Speed
Shift Lug
11. 1st Speed Shift Lug
Assembly
12. 1st Speed Shift Rail
13. 2nd and 3rd Speed
Shift Rail
14. 4th and 5th Speed
Shift Rail
SHIFT CONTROL COVER REMOVAL
1. Remove bolts and lock washers attaching control
cover assembly (21) to transmission case (77).
2. Lift control cover assembly (21) straight up and off
transmission case (77) (fig. 4).
3. Remove and discard control cover to transmission
case gasket (22).
PARKING BRAKE REMOVAL
1. Remove parking brake parts.
2. Shift transmission into two gears at one time to
lock-up the mainshaft; then remove flange nut (42)
from end of mainshaft (31).
3. Using a suitable puller, remove companion flange
(43), including parking brake drum (if used), from
splines at rear end of mainshaft (31). In some cases
flange may be driven off splines with a soft hammer.
BEARING RETAINERS REMOVAL
1. Remove bolts and lock washers attaching each retain­
er (45, 61, and 74) to transmission case.
2. Remove retainers and gaskets. Discard gaskets (46,
60, and 75). Record number of gaskets used at each
retainer. The same number of gaskets must be used at
each retainer when transmission is reassembled.
3. With transmission gears still locked up, cut lock wire
and remove two bolts (66) which hold countershaft
front bearing retainer washer (64) to countershaft
(71). Remove retainer washer (64).
MAIN DRIVE GEAR REMOVAL
REMOTE CONTROL ASSEMBLY OR CON­
TROL TOWER ASSEMBLY REMOVAL
On Transmissions Equipped With Remote Control
Assembly
1. Remove remote control selector lever bellcrank re­
taining snap ring.
2. Remove four bolts and lock washers attaching remote
control assembly to transmission control lever.
3. Lift remote control assembly and gasket from control
cover. Discard gasket.
On Transmissions Equipped With Shift Control
Tower
1. Move gearshift lever to “ N eutral” position.
2. Remove four bolts and lock washers attaching control
tower to transmission control cover.
3. Lift shift control tower straight off control cover. Re­
move and discard tower to cover gasket (20).
Pull main drive gear (57) and bearing assembly (58)
from bore in front of transmission case (77).
NOTE: Mainshaft pilot bearing rollers (56) are
held in cavity at rear end of drive gear (57) by
retainer washer (54) and snap ring (55) (fig.
5).
F ig u re 5 — M a i n D riv e G e a r R e m o v e d
CHEVROLET SERIES 70-80 HEAVY DUTY TRUCK S H O P M A N U A L