Chevrolet 70 1969 Series, Shop Manual

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TRAN SM ISSIO N AND CLUTCH 7-46
F ig u re 3 — T ra n sm is sio n w ith
1. Main Drive Gear
2. Countershaft Drive Gear
3. 4th and 5th Synchronizer Assy.
4. Mainshaft 4th Speed Gear
5. Countershaft 4th Speed Gear
6. Mainshaft 3rd Speed Gear
5. With transmission still locked in two speeds, remove
countershaft rear bearing retaining nut (31).
6. Remove clutch release bearing (1) and support assem­
ble (2) from main drive gear. Remove clutch release
yoke (48).
7. Remove four bolt and lock washer assemblies; then
remove mam drive gear bearing cap and gasket (47).
Discard gasket.
8. Remove main drive gear and bearing assembly (5)
from front of transmission case. Use care as m ain­
shaft pilot bearing (6) may remain in pocket of drive
gear: avoid dropping and damaging the bearing. R e­
move pilot bearing (6) from gear pocket or from pilot
end of mainshaft (22).
9. Remove speedometer drive gear (27) and spacer (26)
(if used).
10. Push mainshaft assembly (22) toward rear of trans­
mission case far enough so mainshaft rear bearing
(23) clears transmission case.
1 1. Using a suitable puller, remove mainshaft rear bear-
Sh ift B a r H o u s in g R e m o v e d
7. 2nd and 3rd Speed Synchronizer Assy.
8. Mainshaft 2nd Speed Gear
9. Mainshaft 1st and Reverse Gear
10. Mainshaft
11. Reverse Idler Gear
ing (23) from end of mainshaft (22) (fig. 4).
12. Tilt front end of mainshaft to clear front end of
transmission case, then remove the mainshaft assem­
bly (22).
REVERSE IDLER GEAR REMOVAL
1. Remove reverse idler lock screw and lock washer,
then remove reverse idler shaft lock.
2. Using a suitable puller in slot in end of reverse idler
shaft (38), pull shaft out of transmission case and rev­
erse idler gear (35) (fig. 5).
3. Remove reverse idler gear (35), bearings (36), and
spacer (37) from transmission case.
4. Remove two reverse idler gear bearings (36) and bear­
ing spacer (37) from inside of idler gear (35).
COUNTERSHAFT REMOVAL
1. Push countershaft (34) toward rear to move counter-
CHEVROLET SERIES 70-80 HEAVY DUTY TRUCK S H O P M A N U A L