Pontiac FIREBIRD 1972 Service Manual page 875

7D-6 1972 PONTIAC SERVICE MANUAL
Fig. 7D-6 Power Flow
-
Third Speed
remains in a neutral position. This engagement of the
main drive gear with the 3rd & 4th speed synchronizer
sleeve imparts torque directly to the mainshaft.
REVERSE (Fig. 7D-8)
In reverse speed, both synchronizer sleeves assume a neu-
tral position. The reverse speed gear is moved forward to
engage the rear reverse idler gear, which is being turned
by the countershaft gear. Because the reverse speed gear
is splined to the mainshaft, this engagement causes the
mainshaft to turn; however, because power flows from
main drive gear to countershaft gear and through reverse
idler gear to reverse speed gear, the direction of rotation
will be opposite that of the engine.
Fig. 7D-7 Power Flow -
Fourth Speed
Fig. 7D-8 Power Flow
-
Reverse
PERIODIC SERVICE RECOMMENDATIONS
TRANSMISSION
nozzle and direct grease liberally into vital areas as fol-
lows:
No periodic service of the transmission is required except
checking for leaks and proper lubricant level every 60
1.
days. If there is evidence of leakage, the leak should be
corrected and lubricant added, if needed.
2.
Refill capacity is 39 fluid ounces (approx. 2-1/2 pints).
Remove filler plug at side of case and add SAE 90 multi-
purpose gear lubricant. Lubricant level should be approxi-
mately level with bottom of filler plug hole. Install plug.
FLOOR SHIFT CONTROLS
Every 6,000 miles or 4 months, lubricate shift linkage and
3.
floor shift control lever contacting faces with water resist-
ent E P chassis lubricant. To lubricate the floor shifter
assembly, use a nekdle-fitting adaptor on a grease gun
Pry dust cover off with a screwdriver blade.
Perform the following operation on each lever, one at
a time:
a. Move lever all the way forward and inject grease
behind lever.
b. Move lever all the way to the rear and inject
grease ahead of lever.
After all lever areas have been greased, replace dust
cover.
CAUTION: Do not overbend dust cover.
ON CAR ADJUSTMENTS
FLOOR SHIFT AND BACK DRIVE
LINKAGE (Figs. 7D-9 thru 7D-11)
2. Loosen adjusting swivel clamp on gearshift control
rod (Figs. 7D-10 or 7D- 1 1).
3. Loosen trunnion jam nuts on all three transmission
1. Position floor shift control lever in Neutral position.
control rods (Fig. 7D-9).