1997 SUBARU LEGACY differential

G3M0871
A: DISASSEMBLY
1. EXTERNAL PARTS
1) Place the transmission unit on a work bench, with the
oil pan facing down.
CAUTION:
Be careful not to bend or damage external parts.
G3M0325
2) Remove the drain plug, and drain differential oil. Tighten
the plug temporarily after draining.
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3) Remove the drain plug, and drain automatic transmis-
sion fluid (ATF). Tighten the plug temporarily after draining.
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4) Extract the torque converter clutch assembly.
NOTE:
Extract the torque converter clutch horizontally. Be care-
ful not to scratch the bushing inside the oil pump shaft.
Note that oil pump shaft also comes out.
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5) Remove the input shaft.
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3-2SERVICE PROCEDURE
4. Overall Transmission

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30) Remove the inhibitor switch.
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31) Remove the transmission harness.
CAUTION:
Be careful not to damage the cord insulation.
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4. TORQUE CONVERTER CLUTCH CASE SECTION
1) Wrap the axle shaft serration with vinyl tape.
2) Remove the differential side retainer with ST.
ST 499787000 WRENCH ASSY
CAUTION:
Hold the differential case assembly by hand to avoid
damaging retainer mounting hole of the torque con-
verter clutch case and speedometer gears.
G3M0956
3) Extract the axle shaft with ST1 and ST2.
ST1 499095500 REMOVER
ST2 499247300 INSTALLER
CAUTION:
Do not reuse the circlip.
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4) Remove the differential case assembly.
CAUTION:
Remove the seal pipe if it is attached. (Reusing is
not allowed.)
Be careful not to damage the retainer mounting hole
of the torque converter clutch case and the speedom-
eter gears.
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3-2SERVICE PROCEDURE
4. Overall Transmission

B: ASSEMBLY OF OVERALL TRANSMISSION
1. TORQUE CONVERTER CLUTCH CASE SECTION
1) Check the appearance of each component and clean.
CAUTION:
Make sure each part is free of harmful cuts, damage
and other faults.
G3M0377
2) Install the washer and snap ring to the speedometer
shaft with ST, and set the oil seal. Then force-fit the shaft
to the torque converter clutch case.
ST 499827000 PRESS
3) Install vehicle speed sensor 2.
CAUTION:
Use new vehicle speed sensor 2, if it has been
removed.
Tightening torque:
5.9±1.5 N⋅m (60±15 kg-cm, 52±13 in-lb)
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4) Install the speedometer driven gear to the speedometer
shaft, and secure with a snap ring.
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5) Force-fit the oil seal to the torque converter clutch case
with ST.
ST 398437700 DRIFT
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6) Install the differential assembly to the case, paying spe-
cial attention not to damage the speedometer gears (drive
and driven) and the inside of the case (particularly, the dif-
ferential side retainer contact surface).
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3-2SERVICE PROCEDURE
4. Overall Transmission

7) Install the circlip to the axle shaft, insert the shaft into
the differential assembly, and tap it into position with a
plastic hammer.
Thrust play:
Approx. 0.3—0.5 mm (0.012—0.020 in)
CAUTION:
If no play is felt, check whether the shaft is fully
inserted. If shaft insertion is correct, replace the axle
shaft.
Be sure to use a new circlip.
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8) Wrap vinyl tape around the splined portion of the axle
shaft.
9) Install the oil seal and outer race (taper roller bearing)
to the differential side retainer. Then screw in the retainer
and the O-ring after coating the threads with oil.
CAUTION:
Pay attention not to damage the oil seal lips.
Do not confuse the RH and LH oil seals.
Keep the O-ring removed from the retainer.
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10) Using the ST, screw in the retainer until light contact
is felt.
ST 499787000 WRENCH ASSY
NOTE:
Screw in the RH side slightly deeper than the LH side.
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11) Hypoid gear backlash adjustment and tooth contact
check
(1) Assemble the drive pinion assembly to the oil pump
housing.
CAUTION:
Be careful not to bend the shims. [W8C0].>
Be careful not to force the pinion against the hous-
ing bore.
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3-2SERVICE PROCEDURE
4. Overall Transmission

B3M0630A
11) Insert the input shaft while turning lightly by hand.
CAUTION:
Be careful not to damage the bushing.
Normal protrusion A:
2200 cc: 50—55 mm (1.97—2.17 in)
2500 cc: 28—32 mm (1.10—1.26 in)
B3M0632A
12) Install the torque converter clutch assembly.
(1) Install the oil pump shaft to the torque converter
clutch.
NOTE:
Make sure the clip fits securely in its groove.
(2) Holding the torque converter clutch assembly by
hand, carefully install it to the torque converter clutch
case. Be careful not to damage the bushing. Also avoid
undue contact between the oil pump shaft bushing and
stator shaft portion of the oil pump cover.
(3) Rotate the shaft lightly by hand to engage the
splines securely.
Dimension A:
2200 cc: 3.9—4.1 mm (0.154—0.161 in)
2500 cc: 7.9—8.1 mm (0.311—0.319 in)
13) Fill ATF and differential gear oil.

Differential gear oil capacity:
1.1—1.3(1.2—1.4 US qt, 1.0—1.1 Imp qt)
Automatic transmission fluid capacity:
2200 cc:
7.9—8.2(8.4—8.7 US qt, 7.0—7.2 Imp qt)
2500 cc:
9.5—9.8(10.0—10.3 US qt, 8.4—8.6 lmp qt)
Recommended fluid:
Dexron II or Dexron III type automatic transmis-
sion
NOTE:
After filling oil, insert the oil level gauge into the oil inlet.
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3-2SERVICE PROCEDURE
4. Overall Transmission

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.
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2) Secure the case in a vise and remove the crown gear
tightening bolts, then separate the crown gear, case (RH)
and case (LH).
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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.
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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.
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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)
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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.
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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.
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3-2SERVICE PROCEDURE
14. Differential Case Assembly

1. AWD System
A. SPECIFICATIONS
1. REAR FINAL REDUCTION GEAR RATIO
Type of gearHypoid
MT AT
2200 cc 2500 cc 2200 cc 2500 cc
Gear ratio
(Number of
gear teeth)3.900
(39/10)4 . 111
(37/9)4.444
(40/9)
Oil capacity 0.8
(0.8 US qt, 0.7 Imp qt)
Rear
differential
gear oilGL-5
2. PROPELLER SHAFT
Front propeller shaft
Joint-to-joint length:
L mm (in)AT 539 (21.22)
MT 598 (23.54)
Outside dia. of tube
mm (in)D
163.5 (2.500)
D
257.0 (2.244)
G3M0014
2
3-4SPECIFICATIONS AND SERVICE DATA
1. AWD System