Mitsubishi 1989 Galant, Service Manual

Page: 763 / 1273

AUTOMATIC TRANSAXLE
AWD A/T
Problem
Probable cause(s)
Remedy
All line pressures are
a. Clogged oil filter.
low (or high).
a. Visually check the oil filter; replace it if it is
b. Improper adjustment of the oil clogged.
NOTE
pressure (line pressure) of the
b. Measure line pressure (kick-down brake
Line pressures are oil
regulator valve.
pressure); readjust the line pressure if there is a
pressures
8
c. Malfunction of the valve body deviation from the standard value, or replace the
7
t h e
assembly.
valve body assembly.
standard oil pressure
d. Looseness of the valve body
Replace the valve body assembly.
table on the
bolts. d. Tighten the valve body bolts to the specified
ing page.
e. Improper discharge pressure of torque.
the oil pump. e. Check the side clearance of the oil pump gear;
Looseness of each check plug, replace the oil pump assembly if necessary.
or malfunction of the O-ring. f. Check each check plug; replace it if necessary.
2. Inappropriate a. Reducing pressure circuit filter a. Disassemble the valve body assembly and check
ing pressure. shaped) is clogged. the filter; replace the filter it is clogged.
Reducing pressure is improperly b. Measure the reducing pressure; readjust if
adjusted. there is a diviation from the standard value, or
c. Malfunction of the valve body
replace the valve body assembly.
assembly. c. Replace the valve body assembly.
3. Inappropriate
a. Malfunction of the kick-down a. Disassemble the kick-down servo and check the
down brake pressure
servo piston’s seal ring,
seal ring, O-ring and D-ring for damage.
D-ring and/or the sleeve’s
Replace the seal ring, O-ring or D-ring if they are
O-ring. cut, scarred or scratched.
b. Malfunction of the valve body b. Replace the valve body assembly.
assembly.
Inappropriate
down brake release
pressure.
a. Malfunction of the
servo piston’s seal ring.
b. Malfunction of the valve body
assembly.
a. Disassemble the servo and check the
seal ring, for damage.
Replace the seal ring if it is cut, scarred or
scratched.
b. Replace the valve body assembly.
inappropriate front
clutch pressure.
a. Malfunction of the
a. Disassemble the servo and check the
servo piston’s seal ring. seal ring for damage.
Malfunction of the valve body
Replace the seal ring if it is cut, scarred or
assembly.
scratched.
c. Unusual wear or abrasion of the
b. Replace the valve body assembly.
front clutch piston and/or the
c. Disassemble the transaxle itself and check for
retainer, or malfunction of the
unusual wear or abrasion of the front clutch
D-ring and/or the seal ring.
piston and/or retainer inner circumference, or for
damage of the D-ring and/or seal ring.
If unusual wear or abrasion, or damage, is
discovered, replace the piston, retainer, D-ring or
seal ring.
Inappropriate rear
clutch pressure.
a. Malfunction of one or more of
the following parts of the rear
clutch: the piston’s
D-ring, or
the retainer’s seal ring, or the
input shaft’s seal ring or
O-ring.
b. Malfunction of the valve body
assembly.
a. Disassemble the rear clutch and check the input
shaft’s O-ring, the retainer’s seal ring, the
ton’s D-ring, etc.; replace any part that is
discovered to be cut, scarred or scratched.
b. Replace the valve body assembly.
Inappropriate end
clutch pressure.
a. Malfunction of the end clutch’s
D-ring and/or
b. Malfunction of the valve body
assembly.
a. Disassemble the end clutch and check the
piston’s oil seal and D-ring, and the retainer’s
seal ring, etc.; replace any part that is cut,
scarred or scratched.
b. Replace the valve body assembly.
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