Chevrolet 1977 10 Series, Repair Manual, Page: 385 / 468

MANUAL TRANSMISSION 7B-5
J-5778
Fig. 7B-1 1 A -R e m o v in g o r In s ta llin g Rear E xtension B u sh in g
spring should be installed into different key cavities on either
side. Slide the sleeve onto the hub aligning the marks made
before disassembly.
NOTE:
A groove around the outside of the synchronizer
hub identifies the end that must be opposite the fork slot
in the sleeve when assembled. This groove indicates the
end of the hub with a greater recess depth.
Extension Oil Seal or Bushing
If bushing in rear of extension requires replacement,
remove seal and use Tool J-5778 to drive bushing into
extension housing (Fig. 7B-11A). Using the same tool, drive
new bushing in from the rear. Coat I.D. of bushing and seal
with transmission lubricant, then install new oil seal using
Tool J-2 1426 or J-5154 (Fig. 7B-12A).
Clutch Bearing Retainer Oil Seal
If the lip seal in the reatiner needs replacement; pry the
Fig. 7 B -1 3 A -R e m o v in g D rive G ear B e a rin g R e ta in e r Seal
old seal out (Fig. 7B-13A) and replace with a new seal using
Installer Tool J-23096, or similar tool, until seal seats in its
bore (Fig. 7B-14A).
ASSEMBLY OF M A IN S H A FT (FIG. 7B-15A)
Turn the front of the m ainshaft upward. Install the
following com ponents of the mainshaft:
1. Install the second speed gear with clutching teeth
upward; the rear face of the gear will ubtt against the flange
on the mainshaft.
2. Install a blocking ring with clutching teeth dow nward
over the synchronizing surface of the second speed gear. All
three blocker rings used in this transmission are identical.
J-21426
J-23096
Fig. 7B-1 2A —Installing Rear Extension Seal
Fig. 7B-1 4 A—Installing Clutch Gear Bearing Retainer Seal