Pontiac FIREBIRD 1972 Service Manual page 834

7A- 12 1972 PONTIAC SERVICE MANUAL
7. From rear of case, remove extension and mainshaft
assembly (Fig. 7A-19).
8. Remove main drive gear and 3rd speed blocker ring
from inside of case and remove 14 roller bearings
from main drive gear.
9. Using snap ring pliers, expand snap ring at front of
rear extension, which retains extension to rear bear-
ing (Fig. 7A-20), and remove extension.
10. Using Countershaft Alignment Tool J 22246, tap out
countershaft and its woodruff key through rear of
case (Fig. 7A-2 1). Remove countershaft gear and two
(2) tanged thrust washers.
11. Remove Countershaft Alignment Tool J 22246.
12. From each end of countershaft gear, remove bearing
washer and 27 bearing rollers.
13. Using a long brass drift or punch, drive reverse idler
gear shaft and woodruff key through rear of case
(Fig. 7A-22).
14. Remove reverse idler gear.
15. Remove 2nd
&
3rd synchronizer sleeve (Fig. 7A-23).
16. Depress speedometer retaining clip and slide gear
from mainshaft.
17. Remove rear bearing snap ring.
18. Using hydraulic or arbor press, press off rear bearing,
spring washer, thrust washer and reverse gear (Fig.
7A-24).
C A UTI 0 N:
When pressing rear beanng, be
careful to center the gear, washers and beanng
on the mainshaft.
19. Remove 1st speed synchronizer snap ring (Fig. 7A-
Fig. 7A-24 Removing Rear Bearing and Reverse Gear
P L A T E S
MUST
BE A
MINIMUM OF 1 -'/I" HIGH
Fig. 7A-25 Removing 1st Speed Synchronizer and Gear
20. Support 1st speed gear on press plate, using two (2)
pieces of stock 6" x 1 7/8" x 1/4" (Fig. 7A-25).
Remove 1st speed synchronizer assembly and 1st
speed gear.
21. Remove 2nd & 3rd speed synchronizer snap ring
(Fig. 7A-23).
22. Support 2nd speed gear on press plate, using two (2)
pieces of stock 6" x 1 7/8" x 1/4" (Fig. 7A-26).
Remove 2nd & 3rd speed synchronizer clutch hub
and 2nd speed gear.
CLEANING AND INSPECTION
1. Check synchronizer clutch hubs, sleeves, keys and
springs and, if necessary, replac; (Fig. 7k-27):
Fig. 7A-26 Removing 2nd & 3rd Speed Synchronizer Clutch
Hub and 2nd Speed Gear