Pontiac FIREBIRD 1972 Service Manual page 990

TWO SPEED AUTOMATIC (M-35) TRANSMISSION 7F-3
ENGINE
L-6
250
cu. in.
.
Fig. 7F-2 Shift Points (in Engine rpm's)
V-8 350
cu. in.
1. Position the selector lever in Drive range and acceler-
2. As the vehicle decreases in speed to 0 mph, the high
ate the vehicle from 0 mph. The low to high gear shift
to low gear shifts (in rpm's) will occur, varying with
points (in rpm's) will vary with the throttle opening.
the throttle opening.
THROTTLE
POSITION
Closed Throttle
Detent Touch
Wide Open Throttle
TWO SPEED AUTOMATIC (M-35) TROUBLE DIAGNOSIS GUIDE
Closed Throttle
Detent Touch
Wide Open Throttle
NO DRIVE IN ANY SELECTOR POSITION
-
R.P.M. I N D R I V E RANGE
1. Low oil level.
2. Clogged oil suction screen.
3. Defective pressure regulator valve.
4. Defective oil pump.
5. Broken input shaft.
6. Sticking oil pump priming valve.
1126
3406
4083
ENGINE FLARES ON STANDSTILL
STARTS BUT ACCELERATION LAGS.
UPSH l FT
1. Low oil level.
2. Clogged oil suction screen.
3. Improper band adjustment.
4. Disengaged or broken band apply linkage.
5. Worn band facing.
6. Blocked servo apply passage.
Min.
1390
3133
3758
DOWNSHIFT
1496
421 5
4646
7. Broken or leaking servo piston ring.
8. Stator in converter not holding (rare).
Max.
1690
3837
4374
Min.
1602
300 1
4162
ENGINE FLARES ON UPSHIFT
Max.
1285
201 4
3476
1320
3344
4435
1. Low oil level.
2. Improper band adjustment.
3. Plugged vacuum modulator line.
4. Clogged oil suction screen.
5. Blocked high clutch feed orifice.
6. Leaking high clutch seals.
7. Worn high clutch plates.
8. Sticking or hung up high clutch piston.
9. Relief ball not sealing in high clutch drum.
1047
2429
3802
NO UPSHIFT
Low band not releasing, probably due to: