Pontiac FIREBIRD 1972 Service Manual page 881

1972 PONTIAC SERVICE M A N U A L 7D-12
Fig. 7 D - 1 8 Removing Speedometer Drive Gear
7. Remove six bolts attaching the rear extension to the
rear bearing retainer and case. 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 shift fork clears reverse
gear and remove extension and gasket.
8. Remove the rear reverse idler gear, idler shaft (with
lock pin) and flat thrust washer from the extension.
9. Remove the speedometer drive gear with Gear
Remover J 5814-A, as shown in Fig. 7D-18, and
remove the reverse gear.
10. Slide 3rd & 4th synchronizer clutch sleeve t o 4th gear
position (forward) before trying to remove mainshaft
assembly from case (Fig. 7D-19).
11. Carefully remove the rear bearing retainer and main-
shaft assembly from the case by tapping bearing re-
tainer with a soft hammer.
12. Unload 17 bearing, rollers and cage from main drive
- -
gear and remove fourth speed synchronizer blocker
ring.
Fig. 7 D - 2 0 Removing M a i n Drive Gear
13. Lift the front reverse idler gear and thrust washer
from case.
14. With soft hammer, tap main drive gear down from
clutch gear bearing (Fig. 7D-20).
15. From inside case, tap out clutch gear bearing and its
locating ring.
16. From the front of the case, tap out the countershaft,
using Loader J 22379 (Fig. 7D-21). Remove the
countershaft gear and both tanged washers. Remove
Loader J 22379 from countershaft gear.
Fig. 7D-19 3rd & 4th Speed Synchronizer Sleeve in 4th
Gear Position
Fig. 7D-2 1 Removing Countershaft