Oil Seal Replacement - Chevrolet 1973 Overhaul Manual

7 M - 4 4 CLUTCHES A ND M A N U A L T R A N S M IS S IO N S
Fig. 12Q--Roller Bearing Retainer
5. Apply a small amount of grease to bearing surface
in shaft recess, install transmission mainshaft pilot
roller bearings (17) and install roller bearing
retainer (fig. 12Q).
NOTE: This roller bearing retainer holds
bearing in position and in final transmission
assembly is pushed forward into recess by
mainshaft pilot.
DRIVE GEAR BEARING RETAINER OIL
SEAL
Replacement
1. Remove retainer and oil seal assembly and gasket.
2. Pry oil seal out of retainer.
3. Install new seal on Tool J-22833 with lip of seal
toward flange of tool.
4. Support front surface of retainer in press, start seal
and tool in retainer bore and drive seal into
retainer until flange of tool bottoms on retainer (fig.
13Q).
5. Install new gasket on retainer and install retainer
on transmission
transmission).
MAINSHAFT ASSEMBLY
Disassembly (Fig. 14Q)
1. Remove first speed gear.
case (when assembling
Fig. 13Q --lnstalling Bearing R etainer Oil Seal
2. Remove snap ring in front of 3rd-4th synchronizer
assembly.
3. Remove reverse driven gear.
4. Press behind second speed gear to remove 3rd-4th
synchronizer assembly, 3rd speed gear and 2nd
speed gear along with 3rd speed gear bushing and
thrust washer (fig. 15Q).
5. Remove 2nd speed synchronizer ring.
6. Remove 2nd speed synchronizer keys.
7. Supporting 2nd speed synchronizer hub at front
face, press mainshaft through removing 1st speed
gear bushing and 2nd speed synchronizer hub.
8. Split 2nd speed gear bushing with chisel and
remove bushing from shaft.
CAUTION: Exercise care not to damage
mainshaft.
Inspection
1. Wash all parts in cleaning solvent.
2. Inspect mainshaft for scoring or excessive wear at
thrust surfaces or splines.
3. Inspect clutch hub and clutch sleeve for excessive
wear and make sure sleeve slides freely on clutch
hub. Also check fit of clutch hub on mainshaft
splines.
NOTE: Third and fourth speed clutch sleeve
should slide freely on third and fourth speed
clutch hub but clutch hub should be snug fit
on shaft splines.
4. Inspect 3rd speed gear thrust surfaces for excessive
scoring and inspect third speed gear mainshaft
bushing for excessive wear.
OVERHAUL MANUAL