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78-34
1977 PONTIAC SERVICE MANUAL
parts are machined, the bushing is not serviced separately.
Countergear Anti-Lash Plate
Inspect the plate teeth for wear or other damage. The
plate and two damper springs are retained to the countergear
by three rivets. Disassembly is not recommended.
REPAIRS
Clutch Keys and Springs (Fig. 78-39)
NOTE: The clutch hubs and sliding sleeves are a
selected assembly and should be kept together as
originally assembled, but the keys and two springs may
replaced if worn or broken.
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KEY
Fig. 78-39 Synchronizer Assembly
1. Mark hub and sleeve so they can be matched upon
reassembly.
2. Push the hub from the sliding sleeve, the keys and the
springs may be easily removed.
3. Place the three keys and two springs in position (one
on each side of hub), so all three keys are engaged by both
springs. The tanged end of each synchronizer spring should
be installed into different key cavaties 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-40). 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 5154 (Fig. 7B-41).
Clutch Gear Bearing Retainer Oil Seal
If the lip seal in the retainer needs replacement, pry the
oil seal out (Fig. 7B-42) and replace with a new seal, using
Tool J 23096 until seal seats in its bore (Fig. 7B-43).
Fig. 78-40 Removing Extension Bushing
Fig. 78-4 1 Installing Extension Oil Seal
NOTE: Lip of seal must face rear of bearing retainer.
ASSEMBLY OF MAINSHAFT (FIG. 7B-
44).
Turn the front of the mainshaft upward. Install the
following components on the mainshaft:
1. Install the third speed gear with clutching teeth
upward; the rear face of the gear will butt against the flange
on the mainshaft.
2. Install a blocking ring with clutching teeth downward
over the synchronizing surface of the third speed gear.
NOTE: All four blocker rings used in this transmission
are identical.
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