Mitsubishi 3000GT Service Manual page 632

AUTOMATIC TRANSAXLE
REMEDIAL ACTION TO TAKE FOR INADEQUATE HYDRAULIC PRESSURE
Symptom Possible cause
1. All line pressures Plugged oil filter
are low (or high).
Improperly adjusted regulator valve line
NOTE:
pressure
Line pressures are
Defective valve body assembly
and (g) shown on
the Standard Oil
Valve body left loose
Pressure Table on
the preceding page.
Improper oil pump delivery pressure
2. Improper reducing Plugged reducing pressure circuit filter
pressure
(L-shaped)
Improperly adjusted reducing pressure
Defective valve body assembly
3. Improper K/D Defective seal ring (1) and D-ring (2) of
brake pressure K/D servo piston and seal ring (3) of
(application) sleeve
Defective valve body assembly
Defective seal ring (1) and D-ring (2) of
brake pressure K/D servo piston and seal ring (3) of
(release) sleeve
Defective valve body assembly
Defective seal ring (1) and D-ring (2) of
clutch pressure K/D servo piston and seal ring (3) of
sleeve
Defective valve body assembly
Worn front clutch piston and retainer or
defective D-ring (4) or seal ring (5)
6. Improper rear
Defective D-ring (6) of piston, seal ring
clutch pressure (7) of retainer, and seal ring (8) and
D-ring (9) of input shaft
Defective valve body assembly
7. Improper end Defective seal ring (IO), D-ring (11) and
clutch pressure oil seal (12) of end clutch
Defective valve body assembly
3. Improper low-re-
Damaged O-ring between valve body
verse brake pres- and transmission
sure
Defective valve body assembly
Defective D-ring (13) of piston or O-ring
(14) of center support.
Sticking torque converter clutch sole-
converter pressure
noid (TCC solenoid) or torque converter
clutch control valve
Plugged or leaky oil cooler and pipings
Damaged seal ring (15) of input shaft
Defective torque converter
Remedy
Visually check oil filter and replace it if plugged.
Measure line pressure (b) (K/D brake pressure) and
readjust line pressure if it is out of specifications.
Or, replace valve body assembly.
Replace valve body assembly.
Torque valve body clamp bolt and mounting bolt to
s p e c i f i c a t i o n .
Check oil pump gear side clearance
pump assembly as necessary.
Disassemble valve body assembly to check filter and
replace filter if it is plugged.
Measure reducing pressure (a) and readjusts as
necessary.
Replace valve body assembly.
Disassemble K/D servo and check seal ring and D-ring
for damage. Replace seal ring or D-ring if damaged or
scratched.
Replace valve body assembly.
Disassemble K/D servo and check seal ring and D-ring
for damage. Replace seal ring or D-ring if damaged or
scratched.
Replace valve body assembly.
Disassemble K/D servo and check seal ring and D-ring
for damage. Replace seal ring or D-ring if damaged or
scratched.
Replace valve body assembly.
Disassemble transaxle and check front clutch piston
and retainer for wear and D-ring and seal ring for
damage. Replace piston, retainer, D-ring, or seal ring
as necessary.
Disassemble rear clutch and check input shaft D-ring,
center support seal ring, and piston D-ring; replace if
damaged or scratched.
Replace valve body assembly.
Disassemble the end clutch and check piston oil seal,
D-ring, and center support seal ring; replace if damage
or scratches are evident.
Replace valve body assembly.
Remove valve body assembly and check O-ring on top
of upper valve body; replace if damage or scratches are
evident.
Replace valve body assembly.
Disassemble transaxle and check D-ring and O-ring;
replace if damage or scratches are evident
Check torque converter clutch system and TCC
solenoid for operation.
Repair or replace cooler or pipings.
Disassemble transaxle and check seal ring; replace if
it is damaaed.
Replace torque converter.
and
replace oil