Pontiac firebird 1968 - Page 427

7D-8
1968 PONTIAC SERVICE MANUAL
6. Remove six bolts attaching the case extension
to the rear bearing retainer. Tap extension with
soft hammer in a rearward direction to start. When
the reverse idler shaft is out as far as it will go,
move extension to left so reverse fork clears re-
verse gear and remove extension and gasket.
7. The rear section of the reverse idler gear, roll
pin, shaft and tanged thrust washer may now be
removed.
8. Remove speedometer gear by depressing re-
tainer clip and sliding gear off output shaft.
9. Slide 3-4 synchronizer clutch sleeve to 4th
speed position (forward) before trying to remove
mainshaft assembly from case (Fig. 7-11).
Fig. 7D-11 3rd and 4th Speed Synchronizer Sleeve in
4th Gear Position
10. Carefully remove the rear bearing retainer
and mainshaft assembly from the case by tapping
bearing retainer with a soft hammer.
11. Unload 17 bearing rollers and cage from main
drive gear and remove fourth speed synchronizing
ring.
12. Lift the front reverse idler gear and thrust
washer from case.
13. With soft hammer, tap main drive gear down
from front bearing as shown in Fig. 7D-12.
14. From inside case, tap out front bearing and
snap ring.
15. From the front of the case, tap out the coun-
tershaft, using loader J 22379 as shown in Fig.
7D-13. Remove the countergear and both tanged
washers. Remove loader J 22379 from countergear.
16. Remove the 112 rollers, six .050" spacers
and roller spacer from countergear (Fig. 7D-8).
Fig. 7D-12 Removing Main Drive Gear
17. Remove mainshaft front snap ring, using J 932
as shown in Fig. 7D-14, and slide third and fourth
speed clutch assembly, third speed gear and syn-
chronizing ring from front of mainshaft.
Fig. 7D-13 Removing Countershaft with J 22379
18. Spread rear bearing retainer snap ring and
press mainshaft out of the retainer (Fig. 7D-15).
19. Remove mainshaft rear snap ring. Support
second speed gear and press on rear of mainshaft
to remove rear bearings, first speed gear and
sleeve, first speed synchronizing ring, 1-2 syn-