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78-32
1977 PONTIAC SERVICE MANUAL
2. Remove drive gear bearing retainer.
3. Remove drive gear bearing to gear stem snap ring,
then remove drive gear bearing by pulling outward on gear
until a screwdriver or other suitable tool can be inserted
between bearing, large snap ring and case to complete
removal (Fig. 7B-30). The drive gear bearing is a slip fit on
the gear and into the case bore. This provides clearance
between case bore and shaft for removal of drive gear and
-
mainshaft assembly.
Fig. 78-32 Expanding Rear Bearing Snap Ring
Fig. 78-30 Removing Drive Gear Bearing
4. Remove extension to case attaching bolts.
5. Remove drive gear, mainshaft and extension assembly
together through the rear case opening (Fig. 7B-31). Remove
drive gear and bearings from mainshaft.
Fig. 78-31 Removing Mainshaft Assembly from
6. Using snap ring pliers, expand the snap ring in .the
extension which retains the mainshaft rear bearing (Fig. 7B-
32) and remove the extension.
7. Using J 22246 at the front of the countershaft, drive
the shaft and its woodruff key out the rear of the case. Tool
J 22246 will now hold the roller bearings in position within
the countergear bore. Remove the gear and thrust washers
from case (Fig. 7B-33).
8. Remove reverse idler gear stop ring. Use a long drift
or punch through the front bearing case bore and drive the
reverse idler shaft and woodruff key through the rear of the
case (Fig. 7B-34).
Fig. 78-33 Removing Countershaft
Fig. 78-34 Removing Reverse Idler Shaft
DISASSEMBLY OF MAINSHAFT
1. Using snap ring pliers, remove the 3rd and 4th speed
sliding clutch hub snap ring from mainshaft and remove
clutch assembly, third gear blocker ring and third speed gear
from front of mainshaft (Fig. 7B-35).
2. Depress speedometer retaining clip and slide gear
from mainshaft.
3. Remove rear bearing snap ring from mainshaft groove
(Fig. 7B-36).
4. Support first gear with press plates and press on rear
of mainshaft to remove first gear, thrust washer, spring
washer and rear bearing from rear of mainshaft (Fig. 7B-37).
5. Remove the 1st and second sliding clutch hub snap
ring from the mainshaft (Fig. 7B-38) and remove the clutch
assembly, 2nd speed blocker ring and second speed gear from
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