Pontiac FIREBIRD 1972 Service Manual page 1044

-
1972 PONTIAC SERVICE MANUAL
IN SECOND NO FIRST SPEED
-
STARTS
SPEED
8. Forward Clutch
-
clutch does not release (will cause
DRIVE in NEUTRAL).
(Locks up in Lo Range)
SLIPS IN ALL RANGES OR SLIPS ON
START
Intermediate Clutch:
(Install pressure gauge)
a. Too many plates in intermediate clutch pack.
1. Low Oil Level
-
add oil.
2. Low Oil Pressure
-
refer to LOW LINE PRESSURE
above.
3. Forward clutch:
a. Clutch plates burned (see BURNED CLUTCH
PLATES below).
b. Incorrect intermediate clutch piston.
DRIVE IN NEUTRAL
1. Manual Linkage
-
misadjusted, (correct alignment in
manual lever shift quadrant is essential).
2. Internal Linkage
-
manual valve disconnected or end
broken.
b. Pump cover oil seal rings broken or worn.
4. Case
-
cross leaks or porosity*.
3. Oil Pump
-
line pressure leaking into forward clutch
apply passage.
4. Forward Clutch
-
incorrect clutch plate usage or
burned clutches (see BURNED CLUTCH PLATES
below).
SLIPPING 1-2 SHIFT
(Install pressure gauge)
1. Low Oil Level
-
add oil.
NO MOTION IN REVERSE OR SLIPS IN
REVERSE
2. Low Oil Pressure
-
refer to LOW LINE PRESSURE
above.
(Install pressure gauge)
3.
2-3 Accumulator
-
oil ring damaged or missing.
1. Low Oil Level
-
add oil.
4. 1-2 Accumulator
-
oil ring damaged, missing or case
bore damaged.
2. Manual Linkage
-
misadjusted (correct alignment in
manual lever shift quadrant is essential).
5. Pump-to-Case Gasket
-
mispositioned or damaged.
3. Low Oil Pressure
-
refer to LOW LINE PRESSURE
above. 6. Intermediate Clutch:
4. Control Valve Assembly:
a. Piston seals damaged or missing.
a. Valve body gaskets
-
leaking, damaged or incor-
rectly installed.
b. Clutch plates burned (See BURNED CLUTCH
PLATES below).
b. 2-3 shift valve train stuck open (in upshifted posi-
tion).
7. Case
-
porosity* between channels.
SLIPPING 2-3 SHIFT
5. Intermediate Servo
-
piston or pin stuck so intermedi-
ate overrun band is applied.
(Install pressure gauge)
6. Low and Reverse Clutch
- piston outer seal damaged
or missing.
1. Low Oil Level
-
add oil.
2. Low Oil Pressure
-
refer to LOW LINE PRESSURE
above.
7. Direct Clutch:
a. Outer seal damaged or missing.
3. Direct Clutch:
b. Clutch plates burned (see BURNED CLUTCH
PLATES below).
a. Piston seals leaks, damaged or missing.