Pontiac FIREBIRD 1972 Service Manual page 864

FOUR SPEED SAGINAW TRANSMISSION 7C-7
Fig. 7C-9 Expanding Snap Ring in Extension Housing
NOTE: At this point, Tool J22246may be left
in to hold the bearing rollers in place or be
taken out, in which case 27 beanng rollers and
a bearing thrust washer must be removed fram
each end of the shaft.
10. Use a long drift or punch through the front bearing
case bore and drive the reverse idler shaft and its
woodruff key through rear of the case (Fig. 7C-11).
11. Remove 3rd and 4th synchronizer snap ring and
remove 3rd and 4th synchronizer sleeve from the
mainshaft assembly (Fig. 7C-12).
12. Support 3rd speed gear with press plates and Dress on
front of mainshaft-to remove 3 r d and 4th synchro-
nizer hub, 3rd speed blocker ring and 3rd speed gear
from front of mainshaft (Fig. 7C-13).
13. Depress speedometer retaining clip and slide gear
from mainshaft.
J
Fig. 7C-10 Removing Countershaft
I
Fig. 7C-1 1 Removing Reverse Idler Shaft
14. Remove rear bearing snap ring from mainshaft
groove (Fig. 7C-14).
15. Support 1st speed gear with press plates and press on
rear of main shaft to remove 1st speed gear, thrust
washer, spring washer, rear bearing and snap ring
from rear of mainshaft (Fig. 7C-15).
CAUTION: When pressing the rear bearing, be
careful to center the gear, washers, bearings
and snap ring on the mainshaft.
16. Remove the 1st and 2nd synchronizer snap ring from
mainshaft and press 1st and 2nd synchronizer assem-
bly, 2nd speed blocker ring and 2nd speed gear from
the rear of the mainshaft (Fig. 7C-16 and 17). This
completes the disassembly of the mainshaft.
Fig. 7C-12 Removing 3 r d and 4th Synchronizer Snap Ring