differential SUBARU LEGACY 1995 Service User Guide

7. Center Differential (AWD Model)
B3M0036A

1Ball bearing


2Snap ring (Inner-110)


3Center differential cover


4Needle bearing


5Adjusting washer


6Viscous coupling


7Pinion shaft

8Differential bevel pinion


9Retainer


10Differential bevel gear


11Washer


12Center differential case


13Snap ring


14Roller bearing
13
3-1COMPONENT PARTS
7. Center Differential (AWD Model)

8. Front Differential
G3M0515

1Drive pinion shaft


2Hypoid driven gear


3Pinion shaft


4Straight pin


5Washer


6Differential bevel gear


7Differential bevel pinion


8Snap ring (Outer)


9Roller bearing


10Differential case

11Oil seal


12Differential side retainer


13O-ring


14Axle drive shaft


15Retainer lock plate
Tightening torque: N⋅m (kg-m, ft-lb)
T1: 25±5 (2.5±0.5, 18.1±3.6)
T2: 62±5 (6.3±0.5, 45.6±3.6)
14
3-1COMPONENT PARTS
8. Front Differential

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

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

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)

B3M0042A
2) Installation of shifter arm
1and selector arm
8
Install shifter arm into the partition from the front while
inserting selector arm into the opening in reverse check
sleeve. Pass shaft through hole in selector arm until its end
comes out of the rear of transfer case.
NOTE:
Apply a coat of gear oil to shifter arm. Also make sure oil
seal is positioned properly.
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)
B3M0049A
3. COMBINATION OF TRANSFER CASE AND
EXTENSION ASSEMBLY
1) Install center differential

1and transfer driven gear
2
into transfer case.
Tightening torque:
T: 37±3 N⋅m (3.8±0.3 kg-m, 27.5±2.2 ft-lb)
B3M0050A
2) Selection of thrust washer (52 x 61 x t)
(1) Measure height“W”between transfer case and ball
bearing on the transfer driven gear

3.
26
3-1SERVICE PROCEDURE
2. Transfer Case and Extension (AWD Model)

G3M0598
3) Remove main shaft rear plate
4.
B3M0330
4) Separating transmission case
(1) Put vinyl tape around splines of right and left axle
drive shafts to prevent damage to oil seals.
B3M0331
(2) Separate transmission case into right and left
cases by loosening seventeen coupling bolts and nuts.
B3M0101B
5) Remove drive pinion shaft assembly
6from left side
transmission case.
NOTE:
Use a hammer handle, etc. to remove if too tight.
6) Remove main shaft assembly

7.
G3M0557
7) Remove differential assembly.
CAUTION:
Be careful not to confuse right and left roller bear-
ing outer races.
Be careful not to damage retainer oil seal.
34
3-1SERVICE PROCEDURE
4. Transmission Case

B3M0333B
3) Drive out spring pin
6, and pull out 3-4 fork rod
7and
shifter fork

8.
NOTE:
When removing rod, keep other rods in neutral. Also, when
pulling out straight pin, remove it toward inside of case so
that it may not hit against case.
4) Drive out straight pin

9, and pull out 1-2 fork rod
10and
shifter fork

11.
G3M0602
5) Pull out straight pin
12, and remove idler gear shaft
13,
reverse idler gear

14and washer
15.
6) Remove outer snap ring

16, and pull out reverse shifter
rod arm

17from reverse fork rod
18. Then take out ball,
spring and interlock plunger from rod.
And then remove rod.
NOTE:
When pulling out reverse shifter rod arm, be careful not to
let ball pop out of arm.
7) Remove reverse shifter lever

19.
G3M0546
8) Remove differential side retainers using ST.
ST 499787000 WRENCH ASSY
G3M0547
9) Remove outer snap ring
20and pull out speedometer
driven gear

21. Next, remove vehicle speed sensor 2, oil
seal, speedometer shaft

22and washer.
36
3-1SERVICE PROCEDURE
4. Transmission Case

G3M0557
3) Install differential assembly
3on left hand transmission
case.
CAUTION:
Be careful not to fold the sealing lip of oil seal.
NOTE:
Wrap the left and right splined sections of axle shaft with
vinyl tape to prevent scratches.
G3M0558
4) Install needle bearing and oil seal onto the front of
transmission main shaft assembly

4, and position in left
side transmission case.
CAUTION:
Wrap clutch splined section with vinyl tape to pre-
vent damage to oil seal.
Apply grease (Unilube #2 or equivalent) to the seal-
ing lip of oil seal.
NOTE:
Align the end face of seal with surface A of left side
transmission main case when installing oil seal.
Be careful not to drop oil seal when installing right side
transmission main case.
Make sure straight pin is positioned in hole in needle
bearing’s outer race.
G3M0575
5) Install drive pinion shaft assembly
5with shims
selected before into transmission case.
NOTE:
Ensure that the knock pin of the case is fitted into the hole
in the bearing outer race.
43
3-1SERVICE PROCEDURE
4. Transmission Case

G3M0595
5. Drive Pinion Assembly (AWD Model)
A: DISASSEMBLY
1. DRIVE PINION SHAFT
1) Straighten lock nut at staked portion. Remove the lock
nut using ST1, ST2 and ST3.
ST1 899884100 HOLDER
ST2 498427100 STOPPER
ST3 899988608 SOCKET WRENCH
G3M0606
2) Withdraw drive pinion from driven shaft.
Remove differential bevel gear sleeve

1, adjusting washer
No. 1

2(25 x 37.5 x t), adjusting washer No. 2
3(25 x
37.5 x 4), thrust bearing

4(25 x 37.5 x 3), needle bearing


5(25 x 30 x 20), drive pinion collar
6, needle bearing
7
(30 x 37 x 23) and thrust bearing
8(33x50x3).
G3M0607
3) Remove roller bearing and washer (33 x 50 x 5) using
ST and press.
ST 498077000 REMOVER
CAUTION:
Do not reuse roller bearing.
G3M0608
2. DRIVEN GEAR ASSEMBLY
CAUTION:
Attach a cloth to the end of driven shaft (on the fric-
tional side of thrust needle bearing) during disassem-
bly or reassembly to prevent damage.
1) Straighten lock nut at staked portion. Remove the lock
nut using ST1 and ST2.
ST1 499987300 SOCKET WRENCH (50)
ST2 899884100 HOLDER
G3M0609
2) Remove 5th driven gear using ST.
ST 499857000 5TH DRIVEN GEAR REMOVER
50
3-1SERVICE PROCEDURE
5. Drive Pinion Assembly (AWD Model)