Chevrolet 70 1969 Series, Shop Manual

Page: 798 / 913

TRANSM ISSIO N AND CLUTCH 7-52
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3. Exam ine all gear teeth and splines for chipped, worn,
broken, or nicked teeth or splines. S m a ll nicks or
burrs may be removed with a fine abrasive stone.
4. Inspect the breather assembly to see that it is open
and not damaged.
5. Check all threaded parts for damaged, stripped, or
crossed threads.
6. C heck all oil passages for obstructions, using brass
rods and air pressure.
7. Replace all gaskets, oil seals, lock wire, cotter pins,
and snap rings. (If snap rings are not damaged or dis­
torted and are not used for sealing as well as retain­
ing, they m ay be reused.)
8. Exam ine synchronizer assemblies for scoring, wear, or
other damage. Replace synchronizers if not in first
class condition.
9. Inspect housings and covers for cracks, breaks, or
other damage. Since repairs by welding, brazing, etc.,
are not recommended, replace all damaged parts.
10. Inspect all bushings for wear or other damage.
11. C heck keys and keyways for condition.
12. Inspect shift forks for wear, distortion, or other dam ­
age.
13. C heck springs for free length, compressed length, dis­
tortion, or collapsed coils.
REPAIR
K e y numbers in text refer to Figure 13 unless otherwise
specified.
M a in sh a ft Rear Bearing C a p
1. If inspection shows necessity, press or drive rear bear­
ing cap oil seal assembly (64) out of rear bearing cap
(63). Discard oil seal.
2. U sin g a suitable sleeve and ham m er or press, drive or
press new oil seal in bore of bearing cap. L ip of oil
seal goes in toward transm ission case.
Clutch Release Bearin g a n d Support
1. If inspection shows clutch release bearing assembly
(1, fig. 2) or support (2, fig. 2) are damaged, press
bearing off support. Replace damaged parts.
2. U sin g a press and suitable sleeve, press new bearing
on support.
Clutch H ousing Replacement
1. Rem ove nuts and lock washers from clutch housing to
transm ission case studs, then remove clutch housing
(3, fig. 2) from transm ission case.
2. In order to obtain correct location of clutch housing
on transm ission case, the following procedure must be
followed:
a. Install main drive gear (76) and bearing assembly
(77) in transm ission case (74).
b. Install drive gear bearing cap (80) over drive gear (76)
and bearing (77) and secure in place with bolt and
lock washer assemblies.
CHEVROLET SERIES 70-80 H EAVY DUTY TRUCK SH O P M A N U A L