SUBARU LEGACY 1996 Service Repair Manual

1. General
A: APPLICATION
Large titleModel
AWD FWD
1 General


2Transfer Case and Extension
(AWD Model)

3 Rear Case (FWD Model)

4 Transmission Case


5 Drive Pinion Assembly (AWD Model)

6 Drive Pinion Assembly (FWD Model)

7 Main Shaft Assembly


8 Center Differential (AWD Model)

9 Front Differential


The table above shows the titles of the main sections in
Service Procedures and the applicable vehicle models.
Carry out service operations by referring to the sections
applicable to the vehicle to be serviced.
15
3-1SERVICE PROCEDURE
1. General

B3M0037A
B: PRECAUTIONS
1) The following job should be followed before disassem-
bly:
(1) Clean oil, grease, dirt and dust from transmission.
(2) Remove drain plug

1to drain oil. After draining,
retighten it as before.
CAUTION:
Replace gasket with a new one.
Tightening torque:
44±3 N⋅m (4.5±0.3 kg-m, 32.5±2.2 ft-lb)
G3M0517
(3) Attach transmission to ST.
ST 499937100 TRANSMISSION STAND SET
2) Rotating parts should be coated with oil prior to assem-
bly.
3) All disassembled parts, if to be reused, should be rein-
stalled in the original positions and directions.
4) Gaskets and lock washers must be replaced with new
ones.
5) Liquid gasket should be used where specified to pre-
vent leakage.
6) Fill transmission gear oil through the oil level gauge
hole up to upper point level gauge.
C: INSPECTION
Disassembled parts should be washed clean first and then
inspected carefully.
1) Bearings
Replace bearings in the following cases:
Bearings whose balls, outer races and inner races are
broken or rusty.
Worn bearings
Bearings that fail to turn smoothly or make abnormal
noise when turned after gear oil lubrication.
B3M0038A
The ball bearing
3on the rear side of the drive pinion shaft


2should be checked for smooth rotation before the drive
pinion assembly is disassembled. In this case, because a
preload is working on the bearing, its rotation feels like it is
slightly dragging unlike the other bearings.
Bearings having other defects
16
3-1SERVICE PROCEDURE
1. General

2) Bushing (each gear)
Replace the bushing in the following cases:
(1) When the sliding surface is damaged or abnormally
worn.
(2) When the inner wall is abnormally worn.
3) Gears
(1) Replace gears with new ones if their tooth surfaces
are broken, damaged, or excessively worn.
(2) Correct or replace if the cone that contacts the
baulk ring is rough or damaged.
(3) Correct or replace if the inner surface or end face
is damaged.
B3M0039A
4) Baulk ring
Replace the ring in the following cases:
When the inner surface and end face are damaged.
When the ring inner surface is abnormally or partially
worn down.
If the gap between the end faces of the ring and the gear
splined part is excessively small when the ring is pressed
against the cone.
Clearance

A:
0.5 — 1.0 mm (0.020 — 0.040 in)
When the contact surface of the synchronizer ring

4
insert is scored or abnormally worn down.
B3M0040A
5) Insert
5(shifting)
Replace the insert if deformed, excessively worn, or defec-
tive in any way.
17
3-1SERVICE PROCEDURE
1. General

6) Oil seal
Replace the oil seal if the lip is deformed, hardened,
damaged, worn, or defective in any way.
7) O-ring
Replace the O-ring if the sealing face is deformed,
hardened, damaged, worn, or defective in any way.
8) Gearshift mechanism
Repair or replace the gearshift mechanism if excessively
worn, bent, or defective in any way.
G3M0521
9) Differential gear
Repair or replace the differential gear in the following
cases:
(1) The hypoid drive gear and drive pinion shaft tooth
surface are damaged, excessively worn, or seized.
(2) The roller bearing on the drive pinion shaft has a
worn or damaged roller path.
(3) There is damage, wear, or seizure of the differen-
tial bevel pinion, differential bevel gear, washer, pinion
shaft, and straight pin.
(4) The differential case has worn or damaged sliding
surfaces.
18
3-1SERVICE PROCEDURE
1. General

2. Transfer Case and Extension (AWD
Model)
A: REMOVAL
B3M0041A
1) Remove transfer cover
1.
2) Remove shifter fork screw

2which secures selector
arm to shifter arm.
3) Remove transfer case

4with extension assembly
3.
19
3-1SERVICE PROCEDURE
2. Transfer Case and Extension (AWD Model)

B: DISASSEMBLY
1. SEPARATION OF TRANSFER CASE AND
EXTENSION ASSEMBLY
G3M0523
1) Separate transfer case
1and extension assembly
2.
2) Remove transfer driven gear

3and center differential


4as a set.
3) Remove thrust washer

5(52x61xt).
B3M0042A
2. TRANSFER CASE
1) Remove neutral switch

6.
NOTE:
Before removing shifter arm, disconnect neutral switch.
2) Draw out shifter arm

1and remove selector arm
8.
3) Remove plug

2, spring
3and reverse check ball
4.
Tightening torque:
T1: 6.4±0.5 N⋅m (0.65±0.05 kg-m, 4.7±0.4 ft-lb)
T2: 10±1 N⋅m (1.0±0.1 kg-m, 7.2±0.7 ft-lb)
T3: 19.6±1.5 N⋅m (2.00±0.15 kg-m, 14.5±1.1 ft-lb)
T4: 25±2 N⋅m (2.5±0.2 kg-m, 18.1±1.4 ft-lb)
20
3-1SERVICE PROCEDURE
2. Transfer Case and Extension (AWD Model)

B3M0043A
4) Remove reverse check sleeve
5.
Disassembly procedure is as follows:
(1) Using a standard screwdriver, remove snap ring

A
(Inner-28).
NOTE:
Replace snap ring with a new one if deformed or weak-
ened.
(2) Remove reverse check plate

B.
(3) Remove reverse check spring

Cwith cam
D.
(4) Remove reverse return spring

E.
(5) Remove reverse accent shaft

F.
(6) Remove O-ring

G.
NOTE:
Reverse check sleeve assembly uses an O-ring which
should not be scratched.
Be careful not to break adjustment shim placed between
reverse check sleeve assembly and case.
B3M0042A
5) Remove back-up light switch
7.
6) Remove oil guide

9.
Tightening torque:
T1: 6.4±0.5 N⋅m (0.65±0.05 kg-m, 4.7±0.4 ft-lb)
T2: 10±1 N⋅m (1.0±0.1 kg-m, 7.2±0.7 ft-lb)
T3: 19.6±1.5 N⋅m (2.00±0.15 kg-m, 14.5±1.1 ft-lb)
T4: 25±2 N⋅m (2.5±0.2 kg-m, 18.1±1.4 ft-lb)
21
3-1SERVICE PROCEDURE
2. Transfer Case and Extension (AWD Model)

3. EXTENSION
G3M0526
1) Remove extension cover
2and shift bracket
1.
2) Remove snap ring

4(Outer-30).
3) Remove transfer drive gear

5.
CAUTION:
Do not remove ball bearing unless replacing.
4) Remove snap ring

6(Inner-72).
5) Remove ball bearing

7.
CAUTION:
Do not reuse ball bearing.
6) Remove oil seal

8.
CAUTION:
Do not reuse oil seal.
22
3-1SERVICE PROCEDURE
2. Transfer Case and Extension (AWD Model)

C: ASSEMBLY
1. EXTENSION
G3M0953
Tightening torque: N⋅m (kg-m, ft-lb)
T: 25±2 (2.5±0.2, 18.1±1.4)
1) Installation of ball bearing
1and selection of snap ring


2(Inner-72)
(1) Attach ball bearing

1(30 x 72 x 17) to extension
and install snap ring

2.
B3M0044A
(2) Measure clearance between snap ring
2and outer
race of ball bearing

1with a thickness gauge.
CAUTION:
Replace ball bearing with a new one.
Clearance:
0—0.15 mm (0—0.0059 in)
(3) If the measurement is not within the specification,
select suitable snap ring

2.
Snap ring (Inner-72)
Part No. Thickness mm (in)
805172071 1.78 (0.0701)
805172072 1.90 (0.0748)
805172073 2.02 (0.0795)
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3-1SERVICE PROCEDURE
2. Transfer Case and Extension (AWD Model)

B3M0045A
2) Installation of transfer drive gear
3
Press transfer drive gear into inner race of ball bearing.
B3M0046A
3) Selection of snap ring
4(Outer-30)
(1) Install snap ring

4on transfer drive shaft.
(2) Measure clearance between snap ring and inner
race of ball bearing with a thickness gauge.
Clearance:
0—0.15 mm (0—0.0059 in)
(3) If the measurement is not within the specification,
select suitable snap ring.
Snap Ring (Outer-30)
Part No. Thickness mm (in)
805030041 1.53 (0.0602)
805030042 1.65 (0.0650)
805030043 1.77 (0.0697)
B3M0047A
4) Install extension cover
6, gasket
5and shift bracket
7.
CAUTION:
Use new gasket.
5) Install oil seal

8with ST.
ST 498057300 INSTALLER
CAUTION:
Use new oil seal.
24
3-1SERVICE PROCEDURE
2. Transfer Case and Extension (AWD Model)