1995 SUBARU LEGACY ecu

B3M0407A
13. Servo Piston

1Band servo piston stem


2Spring


3Lathe cut seal ring


4Band servo piston (1-2)


5Lathe cut seal ring


6O-ring


7Band servo retainer


8O-ring


9Spring


10Retainer


11Snap ring


12Lathe cut seal ring


13Band servo piston (3-4)


14O-ring


15O.D. servo retainer


16Snap ring


17Washer
A: DISASSEMBLY
1) Remove the spring.
2) Remove the band servo piston (3-4).
3) While compressing the retainer from above, remove the
snap ring. Then remove the retainer, spring and stem.
4) Take out the band servo piston (1-2).
B: INSPECTION
1) Check each component for harmful cuts, damage, or
other faults.
2) Check the O-ring and lathe cut ring for damage.
C: ASSEMBLY
1) Install the band servo piston (1-2) to the retainer, and
insert the stem.
2) Put the spring and retainer on the piston. Fit the snap
ring securely while compressing the spring.
3) Install the band servo piston (3-4).
4) Install the spring securely to the band servo piston
(1-2).
CAUTION:
Many different O-rings and lathe cut rings are used.
Be careful not to confuse them when installing.
Be careful not to damage O-rings and lathe cut
rings.
106
3-2SERVICE PROCEDURE
13. Servo Piston

G3M0488
14. Differential Case Assembly
A: DISASSEMBLY
1) Using a press and ST, remove the taper roller bearing.
ST 498077000 REMOVER
CAUTION:
Be careful not to damage the speedometer drive gear.
G3M0489
2) Secure the case in a vise and remove the crown gear
tightening bolts, then separate the crown gear, case (RH)
and case (LH).
G3M0490
3) Pull out the straight pin and shaft, and remove the dif-
ferential bevel gear, washer, and differential bevel pinion.
B: INSPECTION
Check each component for harmful cuts, damage and
other faults.
G3M0490
C: ASSEMBLY
1) Install the washer, differential bevel gear and differen-
tial bevel pinion in the differential case (RH). Insert the
pinion shaft, and fit the straight pin.
NOTE:
Install straight pin from reverse direction.
107
3-2SERVICE PROCEDURE
14. Differential Case Assembly

G3M0489
2) Install the washer and differential bevel gear to the dif-
ferential case (LH). Then put the case over the differential
case (RH), and connect both cases.
3) Install the crown gear and secure by tightening the bolt.
Standard tightening torque:
62±5 N⋅m (6.3±0.5 kg-m, 45.6±3.6 ft-lb)
G3M0491
4) Measurement of backlash (Selection of washer)
Measure the gear backlash with ST1 and ST2, and insert
ST2 through the access window of the case.
ST1 498247001 MAGNET BASE
ST2 498247100 DIAL GAUGE
Standard value:
0.13—0.18 mm (0.0051—0.0071 in)
NOTE:
Measure the backlash by applying a pinion tooth between
two bevel gear teeth.
G3M0492
5) Install the speedometer drive gear. Then force-fit the
taper roller bearing with a press and ST.
ST 398487700 DRIFT
CAUTION:
Be sure to position correctly the locking end of the
speedometer drive gear.
108
3-2SERVICE PROCEDURE
14. Differential Case Assembly

G3M0501
3) Install the driven plates, drive plates, and pressure
plate, and secure with a snap ring with ST1, ST2 and a
press.
ST1 398673600 COMPRESSOR
ST2 498627000 SEAT
G3M0502
4) Apply compressed air to see if the assembled parts
move smoothly.
G3M0503
5) Check the clearance.
Standard value:
0.2—0.6 mm (0.008—0.024 in)
Allowable limit:
1.6 mm (0.063 in)
If the clearance is not within the specified range, select a
proper pressure plate.
NOTE:
Before measuring clearance, place the same thickness of
shim on both sides to prevent pressure plate from tilting.
Available pressure platesPart No. Thickness mm (in)
31593AA151
31593AA161
31593AA171
31593AA1813.3 (0.130)
3.7 (0.146)
4.1 (0.161)
4.5 (0.177)
G3M0505
6) Press-fit the ball bearing with ST.
ST 899580100 INSTALLER
111
3-2SERVICE PROCEDURE
15. Transfer Clutch

G3M0042
(5) Remove the bolts which secure the trailing link to
the rear housing.
G3M0043
(6) Remove the bolts which secure the front and rear
lateral link to the rear housing.
G3M1020
(7) Remove crossmember reinforcement lower (AWD
Sedan only).
(8) Remove the DOJ from the rear differential by using
ST.
ST 208099PA100 DRIVE SHAFT REMOVER
G3M1021
CAUTION:
When removing the DOJ from the rear differential, fit
tire lever to the bolt as shown in figure so as not to
damage the side bearing retainer.
G3M1022
9) Secure rear drive shaft to rear crossmember using wire.
17
3-4SERVICE PROCEDURE
2. Rear Differential

G3M0053
11) Remove heat sealed cover.
12) Remove clamps and bracket of parking brake cable.
13) Remove crossmember reinforcement lower (AWD
Sedan only).
G3M1020
14) Remove DOJ of rear drive shaft from rear differential
using ST.
ST 28099PA100 DRIVE SHAFT REMOVER
G3M1022
15) Secure rear drive shaft to rear crossmember using
wire.
G3M0054
16) Remove lower differential bracket.
G3M0055
17) Support rear differential with transmission jack.
20
3-4SERVICE PROCEDURE
2. Rear Differential

G3M1028
18) Remove self-locking nuts connecting rear differential
to rear crossmember.
G3M0057
19) Remove bolts which secure rear differential front
member to body.
Loosen bolt

1first, then remove bolts
2.
NOTE:
Support front member with the use of a helper to prevent
it from dropping.
20) Remove bolt

1.
G3M1029
21) While slowly lowering transmission jack, move rear
differential forward and remove front member and rear dif-
ferential from body.
G3M1030
22) Remove rear differential from front member.
21
3-4SERVICE PROCEDURE
2. Rear Differential

G3M1050
19) Install rear cover and tighten bolts to specified torque.
Tightening torque:
29±5 N⋅m (3.0±0.5 kg-m, 21.7±3.6 ft-lb)
F: INSTALLATION
To install, reverse the removal sequence.
1) Install the air breather cap tapping with a plastic ham-
mer.
CAUTION:
Be sure to install new air breather cap.
2) Position front member on body by passing it under park-
ing brake cable and securing to rear differential.
NOTE:
When installing rear differential front member, do not con-
fuse the installation sequence of the upper and lower stop-
pers.
G3M1026
3) Install DOJ of rear drive shaft into rear differential. to 3-4 [W2A2].>
ST 28099PA090 SIDE OIL SEAL PROTECTOR
G3M1051
4) Installing procedure hereafter is in the reverse order of
removal.
5) After installation, fill differential carrier with gear oil to
the upper plug level.
CAUTION:
Apply fluid packing to plug.
Fluid packing:
THREE BOND 1205 or equivalent
Oil capacity:
0.8
(0.8 US qt, 0.7 Imp qt)
Tightening torque:
44±4 N⋅m (4.5±0.4 kg-m, 32.5±2.9 ft-lb)
37
3-4SERVICE PROCEDURE
2. Rear Differential