Pontiac tempest 1968 Service Manual page 387

7A-6 1968 P O N T I A C SERVICE M A N U A L
COUNTERSHAFT ROLL PIN
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pill • ^S^^^^^^^^^^B
COUNTERSHAFT
G E A R
F i g , 7 A - 6 Removing Countershaft Retaining Pin
5. Through filler plug hole, drive out countershaft
to case retaining pin (Fig. 7A-6).
6. Remove detent plug retaining set screw, spring
and detent plug (Fig. 7A-7).
7. With transmission in neutral, remove shift fork
to rail locking set screws.
8. Push first and reverse shift rail out rear of
case.
9. Using tool J 3049, rotate 2nd and 3rd shift rail
90° (Fig. 7A-8).
NOTE: Rail must be rotated 90° to disengage
detent plug.
4. Center new seal in opening. Place a suitable
size socket (approximately 1 1/4") on the seal and,
using a soft hammer, tap the seal into place.
5. Reinstall input shaft bearing retainer.
6. Reinstall transmission in car.
TRANSMISSION-DISASSEMBLE
1. Drain lubricant.
2. Remove input shaft bearing retainer and gasket.
3. Remove access cover and gasket.
4. Remove extension housing and gasket.
10. Using brass drift, drive 2nd and 3rd shift rail
and welch plug out front of case.
11. Using countershaft alignment tool J 21775-01,
drive countershaft out rear of case (Fig. 7A-9). Hold
cluster gear with hook to prevent it from dropping
to bottom of case. After removing countershaft,
lower countergear to bottom of case.
12. Remove speedometer drive gear snap ring,
drive gear and retaining ball.
13. Remove rear bearing retaining snap ring
e
14. Remove large snap ring from rear bearing.
15. Slide tool J 21774-1 up over bearing and in­
stall snap ring, (in tool) in snap ring groove in bear­
ing (Fig. 7A-10).
S E T S C R E W -
. ^ S E T SCREW
S P R I N G
f
^ , - - ~ S E T S C R E W
- MACHINED S U R F A C E
1ST AND R E V E R S E
S H I F T F O R K
1ST AND R E V E R S E
S H I F T R A I L
11
I N T E R L O C K
P L U G
D E T E N T -
P L U G
1
S P R I N G
2ND AND 3 R D
S H I F T R A I L
W E L C H P L U G
:4
2ND AND 3RD
i S H I F T F O R K
^!h*
F i g . 7 A - 7 Shift Rails, Forks, Detent Plugs and Detent Springs