BR-25
Master Cylinder
BRAKE
11) While pushing-in the primary piston, install the
C-ring to the groove using pliers.
CAUTION:
Make sure the C-ring is installed to the groove
securely.
12) Install the seal to reservoir tank.
13) Install the reservoir tank to the master cylinder,
and secure with pin.
D: INSPECTION
Inspect for oil leakage from the master cylinder.
NOTE:
After replacing the piston kit, if an oil leakage is
found even though there is no damage or scratches
on the inside of the cylinder, the master cylinder in-
ner wall may be worn. In this case, replace the
master cylinder as an assembly.
(1) Seal
BR-00169
(1) BR-00072
BVC(diag)-2
Basic Diagnostic Procedure
BRAKE VACUUM CONTROL (BVC) (DIAGNOSTICS)
1. Basic Diagnostic Procedure
A: PROCEDURE
CAUTION:
•Subaru Select Monitor is required for reading DTC, reading the current data and clearing the mem-
ory.
•Remove foreign matter (dust, water, oil, etc.) from the engine control module (ECM) connector
when removing or installing.
NOTE:
•To check the harness for broken wires or short circuits, shake problem spot or connector.
•Refer to “Check List for Interview”.
Step Check Yes No
1CHECK PRE-INSPECTION.
1) Ask the customer when and how the trou-
ble occurred using interview check list.
2) Check the error display. (Odo/trip meter)
Is “Er-bb” displayed on the
screen?
Go to step 3.Go to step 2.
2BASIC INSPECTION
Check the components which might affect the
brake vacuum control.
Is the component that might
affect the vacuum control nor-
mal?
Go to step 3.Repair or replace
each component.
3CHECK INDICATION OF DTC.
1) Turn the ignition switch to OFF.
2) Connect the Subaru Select Monitor to data
link connector.
3) Turn the ignition switch to ON, and the Sub-
aru Select Monitor power switch to ON.
4) Read the DTC.
(DTC).>
5) Record all DTC.
Is DTC displayed? Go to step 5.Go to step 4.
4PERFORM GENERAL DIAGNOSTICS.
Inspect using “General Diagnostic Table”.
Is result of inspection OK? Finish the diagno-
sis.
Go to step 5.
5PERFORM THE DIAGNOSIS.
1) Correct the cause of trouble according to
DTC.
2) Perform the clear memory mode.
Mode.>
3) Perform the inspection mode.
Mode.>
4) Read the DTC.
(DTC).>
Is DTC displayed? Repeat step 4 until
DTC is not shown.
Finish the diagno-
sis.
DI-2
General Description
DIFFERENTIALS
1. General Description
A: SPECIFICATION
1. REAR DIFFERENTIAL
When replacing a rear differential assembly, select the correct one according to the following table.
NOTE:
•Using a different rear differential assembly will cause the drive train and tires to drag or emit abnormal
noise.
•For option code, refer to “ID” section.
2. IDENTIFICATION
Identification label positions are shown in the fol-
lowing figures. For details concerning identification,
refer to the “ID” section.
3. REAR DIFFERENTIAL GEAR OIL
Recommended gear oil:
GL–5 (75W–90)
NOTE:
Each oil manufacturer has its base oil and addi-
tives. Thus, do not mix two or more brands.
4. SERVICE DATA
Rear differential type VA2-type
Identification XX
LSD type—
Ty p e o f g e a r H y p o i d g e a r
Gear ratio (Number of gear teeth) 3.583 (43/12)
Oil capacity 0.82 (0.8 US qt, 0.7 lmp qt)
Rear differential gear oil GL-5
(1) Identification
ID-00114
(1)
(1) Item
(2) Rear differential gear oil
(3) API classification
(4) SAE viscosity No. and applicable temperature
MT-00001
(1)
(4)GL-5(3)
(2)
( C)( F)-30 -26 -15 15
9085W80W75W -90
25 30 -5 0-22-1523328659775
Drive pinion bearing preload Measure with spring measurement. (Mea-
sured from the companion flange bolt)
N (kgf, lb)
12.7 — 32.2 (1.3 — 3.28, 2.9 — 7.24)
Measure with torque wrench
N·m (kgf–m, ft–lb)0.48 — 1.22 (0.045 — 0.124, 0.32 — 0.9)
Hypoid driven gear to drive pinion backlash mm (in) 0.10 — 0.15 (0.0039 — 0.0059)
DI-6
General Description
DIFFERENTIALS
C: CAUTION
•Wear work clothing, including a cap, protective goggles and protective shoes during operation.
•Remove contamination including dirt and corrosion before removal, installation or disassembly.
•Keep the disassembled parts in order and protect them from dust and dirt.
•Before removal, installation or disassembly, be sure to clarify the failure. Avoid unnecessary removal, in-
stallation, disassembly and replacement.
•Be careful not to burn yourself, because each part on the vehicle is hot after running.
•Use SUBARU genuine grease etc. or equivalent. Do not mix gear oil, grease, etc. with those of different
grades or from other manufacturers.
•Be sure to tighten fasteners including bolts and nuts to the specified torque.
•Place shop jacks or rigid racks at the specified points.
•Apply gear oil onto sliding or revolution surfaces before installation.
•Before installing the O-ring or snap ring, apply a sufficient amount of gear oil to avoid damage and defor-
mation.
•Before securing a part on a vise, place cushioning material such as wood blocks, aluminum plate, or cloth
between the part and the vise.
•Avoid damaging the mating surface of the case.
D: PREPARATION TOOL
1. SPECIAL TOOL
ILLUSTRATION TOOL NUMBER DESCRIPTION REMARKS
398477701 HANDLE Used for installing the front and rear bearing
cones.
398217700 ATTACHMENT SET Stand for rear differential carrier disassembly
and assembly.
498447120 INSTALLER Used for installing the front oil seal.
ST-398477701
ST-398217700
ST-498447120
DI-12
Differential Gear Oil
DIFFERENTIALS
2. Differential Gear Oil
A: INSPECTION
1) Remove the filler plug, and then check the gear
oil. Replace the gear oil if it is contaminated or de-
teriorated.
2) Check that the gear oil level is up to the bottom
of the filler plug hole. If the level is low, refill up to
the bottom of filler plug.
B: REPLACEMENT
1) Jack–up the vehicle and support it with rigid
racks.
2) Remove the oil drain plug and filler plug, and
drain the gear oil.
CAUTION:
Be careful not to burn your hands, because
gear oil becomes extremely hot after running.
3) Tighten the oil drain plug.
NOTE:
Use a new metal gasket.
Tightening torque:
29 N·m (3.0 kgf-m, 21.7 ft-lb)
4) Fill the differential carrier with gear oil to the bot-
tom of filler plug.
NOTE:
Carefully refill oil while watching the level. Exces-
sive or insufficient oil must be avoided.
Recommended gear oil:
Oil capacity:
0.8 2(0.8 US qt, 0.7 Imp qt)
5) Install the filler plug.
NOTE:
Use a new metal gasket.
Tightening torque:
29 N·m (3.0 kgf-m, 21.7 ft-lb)
(A) Filler plug
(B) Drain plug
(A) Filler plug
(B) Drain plug
(B)DI-00355
(A)
(A)
DI-00357
(B)
(A) Filler plug
(B) Drain plug
(B)DI-00355
(A)
DI-17
Rear Differential (VA–type)
DIFFERENTIALS
12) Tighten the self-locking nut.
Tightening torque:
70 N·m (7.1 kgf-m, 51 ft-lb)
13) Lower the transmission jack.
14) Install the air breather hose to the sub frame.
15) Install the propeller shaft.
16) Install the heat shield cover.
17) Install the rear exhaust pipe and muffler.
C: DISASSEMBLY
To detect the real cause of trouble, inspect the fol-
lowing items before disassembling.
•Tooth contact and backlash between hypoid driv-
en gear and drive pinion
•Total preload of drive pinion
1) Remove the air breather hose.
2) Set the ST on vise and install the differential as-
sembly to ST.
ST 398217700 ATTACHMENT SET
3) Drain the gear oil by removing the plug.
4) Remove the rear differential oil temperature
switch.
5) Remove the rear cover by loosening retaining
bolts.
6) Remove the lock plate RH and LH.
7) Remove the holder RH and LH with ST.
ST 18630AA010 WRENCH ASSY
8) Pull out the differential case assembly from dif-
ferential carrier.
NOTE:
Be careful so that the teeth do not to hit against the
case.
DI-00269
STDI-00363
DI-00388
DI-00364
ST
DI-00365
DI-00366
DI-20
Rear Differential (VA–type)
DIFFERENTIALS
1) Adjusting preload for front and rear bearings
Adjust the bearing preload between front and rear
bearings with collar and washer. Pinion height ad-
justing washer is not affected by this adjustment.
The adjustment must not be carried out with oil seal
inserted.
(1) Install the rear bearing race into the differen-
tial carrier using ST1 and ST2.
ST1 398477701 HANDLE
ST2 398477703 DRIFT 2
(2) Using the ST, install the front bearing race to
the differential carrier.
ST 499277200 INSTALLER
(3) Insert the front bearing cone.
NOTE:
Use new front bearing cone.
(4) Measure and record the thickness of pinion
adjust washer.
NOTE:
If tooth contact (drive pinion, hypoid driven gear) is
normal in the inspection before disassembling, ver-
ify that the washer is not deformed, and then re-use
the used washer.
(5) Insert the ST1 into carrier with the pinion
height adjusting washer and rear bearing cone
fitted onto it.
NOTE:
Use new rear bearing cone.
(6) Install the preload adjusting collar & washer,
front bearing cone, collar, companion flange,
and washer & self-locking nut.
ST1 18678AA000 DUMMY SHAFT
(7) Turn ST1 by hand to seat the bearing, and
measure the initial load and initial torque with a
spring scale while tightening the selflocking nut.
Select the preload adjusting washer and collar
so that the specified preload is obtained when
nut is tightened to the specified torque.
NOTE:
•Use a new self-locking nut.
•Be careful not to give excessive preload.
•When tightening the self-locking nut, lock com-
panion flange with ST2 as shown in the figure.
•Measure the preload in direction of tangent to the
flange.
ST1 18678AA000 DUMMY SHAFT
ST2 498427200 FLANGE WRENCH
Tightening torque:
191 N·m (19.5 kgf-m, 141 ft-lb)
DI-00375
ST2
ST1
DI-00376
ST
(A) Pinion height adjusting washer
(B) Preload adjusting collar
(C) Preload adjusting washer
(D) Collar
ST1DI-00377
(D)(C)(B)(A)
DI-00398
ST2
DI-28
Rear Differential (VA–type)
DIFFERENTIALS
23) Affix with the attachment clip so that the white
marking of the hose is within the range of Z (87°).
E: INSPECTION
Wash all the disassembled parts clean, and exam-
ine them for wear, damage or other defects. Repair
or replace the defective parts as necessary.
1) Hypoid driven gear and drive pinion
•If there is evidently an abnormal tooth contact,
find out the cause and adjust until the teeth contact
correctly. Replace the gear if there is an excessive
worn or an incapable adjustment.
•If crack, cutout or seizure is found, replace the
parts as a set. Slight damage of some teeth can be
corrected by oil stone or the like.
2) Side gear and pinion mate gear
•Replace the differential case assembly if cracks,
scoring or other defects are evident on tooth sur-
face.
3) Bearing
Replace if seizure, peeling, wear, rust, dragging
during rotation, noise or other defect is evident.
4) Oil seal
Replace if deformed or damaged, and at every dis-
assembling.
5) Differential carrier
Replace if the bearing bores are worn or damaged.
6) Differential case
Replace if its sliding surfaces are worn or cracked.
7) Companion flange
Replace if the oil seal lip contact surface shows
cracking.
1. HYPOID DRIVEN GEAR BACKLASH
Using a dial gauge, check the backlash of hypoid
driven gear.
Hypoid driven gear backlash:
0.10 — 0.15 mm (0.0039 — 0.0059 in)
If the hypoid driven gear backlash is not within the
specification, adjust the side bearing preload or re-
pair if necessary.
2. TOOTH CONTACT BETWEEN HYPOID
DRIVEN GEAR AND DRIVE PINION
Inspect the tooth contact between the hypoid driv-
en gear and drive pinion.
3. COMPANION FLANGE
1) If rust or dirt is attached to the companion flange,
remove them.
2) Set a dial gauge at a companion flange surface
(mating surface of propeller shaft and companion
flange), and then measure the companion flange
runout.
Limit of runout:
0.08 mm (0.003 in)
(1) 0 — 1 mm (0 — 0.04 in)
(2) Marking
DI-00478
B
B
A
A
Z
(1)
(2)
DI-00099
DI-00360