Pontiac FIREBIRD 1972 Service Manual page 899

TURBO HYDRA-MATIC (M-40) TRANSMISSION 7E-9
b. Parking pawl broken
c. Parking pawl bracket loose, burned, rough edges
or incorrectly installed.
d. Parking pawl return spring missing, broken or
incorrectly hooked.
a. Gears or thrust bearings damaged.
b. Front internal gear ring damaged.
DURING ACCELERATION
-
ANY GEAR
1. Transmission or cooler lines grounded to underbody.
TRANSMISSION NOISY
2. Motor mounts loose or broken.
CAUTION: Before checking transmission for
what is believed to be "transmission noise';
make sure that the noise is not from the water
pump, alternator, power steering, etc. These
components can be isolated by removing the
proper belt and running the engine no more
than two minutes at one time.
SQUEAL AT LOW VEHICLE SPEED
Speedometer driven gear shaft seal
-
requires lubrication
or replacement.
BURNED CLUTCH PLATES
PARK, NEUTRAL AND ALL DRIVING RANGES
1. Forward clutch:
1. Pump Cavitation:
a. Oil level low.
b. Plugged or restricted filter.
c. Intake pipe "0" ring damaged.
d. Intake pipe split, porosity in case intake pipe bore.
e. Water in oil.
f. Porosity or voids at transmission case (pump
face) intake port.
g. Pump-to-case gasket off location.
2. Pump Assembly:
a. Gears damaged or defective; driving gear in-
stalled backwards.
b. Crecent interference.
c. Oil seal rings damaged or worn.
3. Converter:
a. Loose flywheel-to-converter bolts.
a. Check ball in clutch drum damaged, stuck or
missing.
b. Clutch piston cracked, seals damaged or missing.
c. Low line pressure (see LOW LINE PRESSURE
above).
d. Manual valve mispositioned (may also cause
front band failure).
e. Restricted oil feed to forward clutch (clutch hous-
ing to inner and outer areas not drilled, restricted,
porosity in pump, etc.).
f. Transmission case valve body face not flat or
porosity between channels.
g. Manual valve bent and center land not ground
properly.
h. Pump cover oil seal rings missing, broken or un-
dersize, ring groove oversize.
2. Intermediate Clutch:
a. Constant bleed orifice in center support missing.
b. Damaged converter.
b. Rear accumulator piston oil ring damaged or
missing.
FIRST, SECOND AND/OR REVERSE GEARS
Planetary Gear Set:
c. 1-2 accumulator valve stuck in control valve as-
sembly.