Pontiac FIREBIRD 1972 Service Manual page 878

FOUR-SPEED MUNCIE TRANSMISSION 7D-9
MINOR REPAIRS
SPEEDOMETER DRIVEN GEAR
REMOVE
1. Disconnect speedometer cable.
2. Remove retainer-to-rear extension bolt and lock-
washer and remove retainer.
3. Insert screwdriver in slot in fitting and pry fitting,
gear and shaft from rear extension.
4. Pry O-ring seal from groove in fitting and discard.
5. Check gear, shaft and fitting for wear and replace, if
necessary.
REPLACE
1. Install new O-ring seal in groove and insert shaft.
2. Hold the assembly so slot in fitting is toward boss on
rear extension and install in extension.
3. Push fitting into rear extension until retainer can
be
inserted into slot.
4. Install retainer bolt and lockwasher and tighten to 4
lb. ft. torque.
5. Connect speedometer cable to speedometer driven
gear and sleeve assembly.
Fig. 7D-12 Removing Rear Extension Oil Seal
TRANSMISSION REAR EXTENSION OIL
SEAL
REMOVE AND REPLACE
1. Remove propeller shaft as outlined in Section 4E.
2. Use punch or other suitable tool to loosen oil seal
from rear extension, remove and discard (Fig. 7D-
12).
3. Wash counterbore with cleaning solvent and inspect
for damage.
4. Inspect propeller shaft yoke for nicks, burrs or scrat-
ches which would cut new seal or cause seal to leak
or damage bushing.
5. Coat new seal with sealing compound and press
straight into bore of rear extension with J 5154-A
(Fig. 7D- 13).
CAUTION:
Do not excessively force the seal
against the seat in the extension.
6. Reinstall propeller shaft assembly.
TRANSMISSION CASE COVER
REMOVE
1. Disconnect control rods from shifter levers (Fig.
7D-9) and disconnect electrical lead to T.C.S. switch.
2. Shift transmission into second speed, before remov-
ing case cover, by moving 1st & 2nd shifter lever into
forward detent position.
Fig. 7D-13 Installing Rear Extension Oil Seal