Low clutch piston SUBARU LEGACY 1999 Service Repair Manual

1. Engine Cooling System Trouble in General
TroubleCorrective action
Over-heatinga. Insufficient engine coolantReplenish engine coolant, inspect for leakage, and
repair.
b. Loose timing belt Repair or replace timing belt tensioner.
c. Oil on drive belt Replace.
d. Malfunction of thermostat Replace.
e. Malfunction of water pump Replace.
f. Clogged engine coolant passage Clean.
g. Improper ignition timingInspect and repair ignition control system.
On-Board Diagnostics II System
h. Clogged or leaking radiator Clean or repair, or replace.
i. Improper engine oil in engine coolant Replace engine coolant.
j. Air/fuel mixture ratio too leanInspect and repair fuel injection system.
On-Board Diagnostics II System
k. Excessive back pressure in exhaust system Clean or replace.
l. Insufficient clearance between piston and cylinder Adjust or replace.
m. Slipping clutch Repair or replace.
n. Dragging brake Adjust.
o. Improper transmission oil Replace.
p. Defective thermostat Replace.
q. Malfunction of electric fanInspect radiator fan relay, engine coolant temperature
sensor or radiator motor and replace there.
Over-coolinga. Atmospheric temperature extremely low Partly cover radiator front area.
b. Defective thermostat Replace.
Engine coolant
leaks.a. Loosened or damaged connecting units on
hosesRepair or replace.
b. Leakage from water pump Replace.
c. Leakage from water pipe Repair or replace.
d. Leakage around cylinder head gasket Retighten cylinder head bolts or replace gasket.
e. Damaged or cracked cylinder head and crank-
caseRepair or replace.
f. Damaged or cracked thermostat case Repair or replace.
g. Leakage from radiator Repair or replace.
Noisea. Defective drive belt Replace.
b. Defective radiator fan Replace.
c. Defective water pump bearing Replace water pump.
d. Defective water pump mechanical seal Replace water pump.
26
2-5[K100]DIAGNOSTICS
1. Engine Cooling System Trouble in General

4. Control Valve and Harness Routing
B3M0928A
(1) Stay
(2) Transmission harness
(3) O-ring
(4) O-ring
(5) Torque converter turbine speed
sensor
(6) O-ring
(7) Vehicle speed sensor 2 (Front)
(8) O-ring
(9) Vehicle speed sensor 1 (Rear)
(10) Upper valve body
(11) Accumulator piston(12) Accumulator spring
(13) Side plate
(14) Separate plate
(15) Middle valve body
(16) Separate plate
(17) Fluid filter
(18) Fluid filter
(19) Lower valve body
(20) Shift solenoid 2
(21) Shift solenoid 1
(22) 2-4 brake timing solenoid
(23) Duty solenoid D (2-4 brake)(24) ATF temperature sensor
(25) Duty solenoid A (Line pressure)
(26) Low clutch timing solenoid
(27) Duty solenoid B (Lock-up)
(28) Oil strainer
Tightening torque: N´m (kg-m, ft-lb)
T1:
7±1 (0.7±0.1, 5.1±0.7)
T2:8±1 (0.8±0.1, 5.8±0.7)
20
3-2[C400]COMPONENT PARTS
4. Control Valve and Harness Routing

7. Low Clutch and Low & Reverse Brake
B3M1017A
(1) Retaining plate
(2) Drive plate
(3) Driven plate
(4) Dish plate
(5) Snap ring
(6) Cover
(7) Spring retainer
(8) Lathe cut seal ring
(9) Low piston
(10) Lathe cut seal ring
(11) Low clutch drum(12) Needle bearing
(13) Snap ring
(14) One-way clutch
(15) Snap ring
(16) Thrust needle bearing
(17) Seal ring
(18) Needle bearing
(19) One-way clutch inner race
(20) Socket bolt
(21) Spring retainer
(22) Return spring(23) Snap ring
(24) Retaining plate
(25) Leaf spring
(26) Drive plate
(27) Driven plate
(28) Dish plate
(29) Low and reverse brake piston
Tightening torque: N´m (kg-m, ft-lb)
T:
25±2 (2.5±0.2, 18.1±1.4)
23
[C700]3-2COMPONENT PARTS
7. Low Clutch and Low & Reverse Brake

19) Take out the thrust needle bearing, planetary
gear assembly and the low clutch assembly.
B3M1076A
20) Remove snap ring.
B3M1077A
21) Take out 2-4 brake return spring.
B3M1078A
22) Take out 2-4 brake piston and piston retainer.
CAUTION:
When removing the brake piston 2-4 and piston
retainer, be careful not to rub or bump them
against the transmission case.
B3M1079A
23) Separate 2-4 brake piston and piston retainer.
B3M1080A
24) Pull out leaf spring.
CAUTION:
Be careful not to bend leaf spring during
removal.
B3M0956A
25) Remove snap ring.
B3M1081A
26) Take out retaining plate, drive plate, driven
plate and dish plate.
B3M1082
52
3-2[W11B3]SERVICE PROCEDURE
11. Overall Transmission

27) Turning the case upside down, take out the
one-way clutch inner race, retainer and wave
spring.
NOTE:
After loosening all socket bolts, place the side of
the transmission case on the floor.
B3M0958
28) Take out the low & reverse piston by applying
compressed air.
B3M0957
29) Using ST, remove ATF filter.
NOTE:
If any of the clutches or brakes are abnormally
worn, replace ATF filter and oil seal with new ones.
ST 498545400 OIL FILTER WRENCH
B3M1084A
30) Pull off the straight pin of manual lever.
B3M1083A
31) Remove bolts securing select lever, then
remove select lever, manual lever and parking rod.
CAUTION:
Be careful not to damage the lips of the press-
fitted oil seal in the case.
B3M1085A
32) Remove the detention spring.
B3M1086A
33) Remove the inhibitor switch.
B3M1087A
53
[W11B3]3-2SERVICE PROCEDURE
11. Overall Transmission

5) Insert range select lever, and tighten bolt.
Tightening torque:
6
±1 N´m (0.6±0.1 kg-m, 4.3±0.7 ft-lb)
B3M1096A
6) Insert manual lever and parking rod.
B3M1085A
7) Insert spring pin to manual lever.
B3M1083A
8) Install the low and reverse piston.
CAUTION:
IBe careful not to tilt the piston when install-
ing.
IBe careful not to damage the lip seal.
B3M1097A
9) Install return spring.
B3M1098A
10) Install spring retainer.
B3M1099A
11) Install the one-way clutch inner race.
61
[W11C2]3-2SERVICE PROCEDURE
11. Overall Transmission

14. Control Valve Body
A: PRECAUTION
The control valve is composed of parts which are
accurately machined to a high degree and should
be handled carefully during disassembly and
assembly. As these parts are similar in shape, they
should be arranged in neat order on a table after
disassembly so that they can be easily installed to
their original positions. Spring loaded parts shouldbe also handled carefully, as springs may jump out
of place when the parts are disassembled or
removed. Extreme care should be taken so as not
to drop valves on the floor. Before assembling, the
parts and valves should be dipped in a container
filled with the ATF. Make sure that the valves are
clean and free from any foreign material before
assembly. Torque specifications should also be
observed.
B3M1129A
(1) 2-4 brake clutch accumulator
piston B
(2) 2-4 brake clutch accumulator
piston A
(3) Low clutch accumulator piston
(4) High clutch accumulator piston A
(5) High clutch accumulator piston B
(6) Pressure regulator sleeve
(7) Pressure regulator plug
(8) Pressure regulator valve
(9) Reverse inhibit valve
(10) Accumulator control valve B(11) 2-4 brake timing plug
(12) 2-4 brake timing sleeve
(13) 2-4 brake timing valve A
(14) 2-4 brake timing valve B
(15) Torque convertor regulator valve
(16) Pressure modifier valve
(17) Accumulator control valve A
(18) Low clutch timing valve A
(19) Low clutch timing sleeve
(20) Low clutch timing plug
(21) Low clutch timing valve B
(22) Shift valve B(23) Shift valve A
(24) Manual valve
(25) Throttle accumulator piston B
(26) 1st reducing valve
(27) Throttle accumulator piston A
(28) Lock-up control valve
(29) Lock-up control plug
(30) Lock-up control sleeve
(31) Modifier accumulator piston
(32) Pilot valve
76
3-2[W14A0]SERVICE PROCEDURE
14. Control Valve Body

18. Low Clutch Drum and Planetary Gear
A: DISASSEMBLY
B3M1155A
(1) Snap ring
(2) Front planetary carrier
(3) Thrust needle bearing
(4) Rear sun gear
(5) Thrust needle bearing
(6) Rear planetary carrier
(7) Washer
(8) Thrust needle bearing
(9) Rear internal gear(10) Washer
(11) Retaining plate
(12) Drive plate
(13) Driven plate
(14) Dish plate
(15) Snap ring
(16) Cover
(17) Spring retainer
(18) Lathe cut seal ring(19) Low clutch piston
(20) Lathe cut seal ring
(21) Low clutch drum
(22) Needle bearing
(23) Inner snap ring
(24) One-way clutch
(25) Outer snap ring
91
[W18A0]3-2SERVICE PROCEDURE
18. Low Clutch Drum and Planetary Gear

9) Install the one-way clutch inner race to the low
clutch drum, and apply compressed air to remove
the low clutch piston.
B3M0960A
10) Remove the one-way clutch inner race.
11) Remove the one-way clutch after taking out
the snap ring.
B3M1163A
12) Remove the needle bearing after taking out
the snap ring.
B3M1164A
B: INSPECTION
1) Drive plate facing for wear and damage
2) Snap ring for wear, return spring for setting and
breakage, and snap ring retainer for deformation
3) Lip seal and lathe cut ring for damage
4) Piston and drum check ball for operation
93
[W18B0]3-2SERVICE PROCEDURE
18. Low Clutch Drum and Planetary Gear

C: ASSEMBLY
B3M1155A
(1) Snap ring
(2) Front planetary carrier
(3) Thrust needle bearing
(4) Rear sun gear
(5) Thrust needle bearing
(6) Rear planetary carrier
(7) Washer
(8) Thrust needle bearing
(9) Rear internal gear(10) Washer
(11) Retaining plate
(12) Drive plate
(13) Driven plate
(14) Dish plate
(15) Snap ring
(16) Cover
(17) Spring retainer
(18) Lathe cut seal ring(19) Low clutch piston
(20) Lathe cut seal ring
(21) Low clutch drum
(22) Needle bearing
(23) Inner snap ring
(24) One-way clutch
(25) Outer snap ring
1) Install lathe cut seal ring to low clutch piston.
2) Fit the low clutch piston to the low clutch drum.
B3M1165A
3) Install spring retainer to low clutch piston.
B3M1166A
94
3-2[W18C0]SERVICE PROCEDURE
18. Low Clutch Drum and Planetary Gear