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78-22
1 9 7 7 PONTIAC SERVICE MANUAL
"ON-CAR" SERVICE
3-SPEED 7 6 M M LT. DUTY
REAR EXTENSION OIL SEAL
-
R & R
Before raising vehicle, disconnect battery and release
parking brake.
1. Raise vehicle on hoist and remove propeller shaft as
outlined in Section 4A.
2. Remove oil seal by prying out with screwdriver.
3. Wash counterbore with cleaning solvent and inspect
for damage.
4. Inspect propeller shaft yoke for nicks, burrs or
scratches which could cut new seal or cause seal to leak or
damage bushing.
5. Coat new seal with sealing compound and start new
seal in opening.
6. Place Collar J 6403-2 onto Installer J 6403-1 and over
end of mainshaft (Fig. 7B-16).
NOTE: Flat side of J 6403-2 must be toward rear of J
6403-1.
7. Tap end of tool with soft hammer to seat oil seal and
re-install propeller shaft.
MUNCIE TRANSMISSION
Fig. 78-1 7 Removing Rear Extension Bushing
Fig. 78-1 8 Installing Rear Extension Bushing
CASE COVER
-
R
&
R
Fig. 78-16 Installing Rear Extension Oil Seal
REAR EXTENSION BUSHING
-
R & R
Before raising vehicle, disconnect battery and release
parking brake.
1. Raise vehicle on hoist and remove propeller shaft as
outlined in Section 4A.
2. Inspect Remover J 4830-02 over mainshaft and
tighten screw.
3. Attach Slide Hammer J 2619 (Fig. 7B-17) and, using
hammer, pull bushing and oil seal from rear extension.
4. Start new bushing into rear extension and, using
Installer J 6403 1-1 and a soft hammer, tap bushing into place
(Fig. 7B- 18).
5. Install new oil seal, using Installer J 6403- 1 and Collar
J 6403-2 (Fig. 7B-16), tapping end of installer with soft
hammer to seat oil seal.
6. Re-install propeller shaft.
Before raising vehicle, disconnect battery and release
parking brake.
1. After shifting transmission into neutral, raise vehicle
on hoist.
2. Loosen case cover bolts and allow transmission fluid
to drain.
3. Disconnect control rods from shifter levers, remove
bolts and case cover from transmission case.
4. Disassemble cover by removing outer shifter levers,
detent cam spring, shift forks, shifter shafts, detent cam
retainer ring and detent cams (Fig. 7B-19).
5. Inspect all parts and seals and replace if necessary.
6. Install shifter shaft seals, detent cams, detent cam
retainer ring, shifter shafts, shift forks and detent cam spring.
NOTE: Detent cams, shifter shafts and shift forks are
interchangeable.
7. Install new gasket and attach case cover to
transmission case.
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