Center Support; Burned Clutch Plates - Pontiac TRANS AM 1977 Service Manual

7A4-16 1977 PONTIAC SERVICE MANUAL
-
/OIRECT
cLuTc
,
REVERSE
,LUBRICATION
DIRECT CLUTCH INTER~~EDIATE
REVERSE
CLUTCH
Fig.
7A4-1 1 Center
Support
B. GASKETS INSTALLED IN REVERSE ORDER.
BURNED CLUTCH PLATES
1. FORWARD CLUTCH
A. CHECK BALL IN CLUTCH HOUSING
DAMAGED, STUCK OR MISSING.
B. CLUTCH PISTON CRACKED, SEALS
DAMAGED OR MISSING.
C. LOW LINE PRESSURE.
D. MANUAL VALVE MISPOSITIONED.
E. RESTRICTED OIL FEED TO FORWARD
CLUTCH (EXAMPLES: CLUTCH HOUSING TO
INNER AND OUTER AREAS NOT DRILLED,
RESTRICTED OR POROSITY IN PUMP).
F. PUMP COVER OIL SEAL RINGS MISSING,
BROKEN OR UNDERSIZE: RING GROOVE
OVERSIZE.
G. CASE VALVE BODY FACE NOT FLAT OR
POROSITY BETWEEN CHANNELS.
H. MANUAL VALVE BENT AND CENTER LAND
NOT GROUND PROPERLY.
2. INTERMEDIATE CLUTCH
A. CONSTANT BLEED ORIFICE IN CENTER
SUPPORT MISSING (Fig. 7A4-11).
B. REAR ACCUMULATOR PISTON OIL RING,
DAMAGED OR MISSING.
'
C. 1-2 ACCUMULATOR VALVE STUCK IN
CONTROL VALVE ASSEMBLY.
D. INTERMEDIATE CLUTCH PISTON SEALS
DAMAGED OR MISSING.
E. CENTER SUPPORT BOLT LOOSE.
F. LOW LINE PRESSURE.
G. INTERMEDIATE CLUTCH PLUG IN CASE
MISSING
H. CASE VALVE BODY FACE NOT FLAT OR
POROSITY BETWEEN CHANNELS.
I. MANUAL VALVE BENT AND CENTER LAND
NOT GROUND PROPERLY.
3. DIRECT CLUTCH
A. RESTRICTED ORIFICE IN VACUUM LINE TO
MODULATOR (POOR VACUUM RESPONSE).
B. CHECK BALL IN DIRECT CLUTCH PISTON
OR DIRECT CLUTCH HOUSING DAMAGED, STUCK
OR MISSING.
C. LEAKING MODULATOR BELLOWS.
D. CENTER SUPPORT BOLT LOOSE (BOLT MAY
BE TIGHT IN SUPPORT BUT NOT HOLDING
SUPPORT TIGHT TO CASE).
E. CENTER SUPPORT OIL RINGS OR GROOVES
DAMAGED OR MISSING.
F. CLUTCH PISTON SEALS DAMAGED OR
MISSING.
G. FRONT AND REAR SERVO PISTONS AND
SEALS DAMAGED.
H. MANUAL VALVE BENT AND CENTER LAND
NOT CLEANED UP.
I. CASE VALVE BODY FACE NOT FLAT OR
POROSITY BETWEEN CHANNELS.
J. INTERMEDIATE ROLLER CLUTCH
INSTALLED BACKWARDS.
K. 3-2 VALVE, 3-2 SPRING OR 3-2 SPACER PIN
INSTALLED IN THE WRONG SEQUENCE IN 3-2
VALVE BORE.
L. INCORRECT COMBINATION OF FRONT
SERVO AND ACCUMULATOR PARTS.