Subaru Legacy (2005 year). Manual - part 741

DI-71

DIFFERENTIALS

Rear Differential (VA-type)

4. 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)

3) Set the gauge inside of the companion flange,
and measure the runout.

Limit of runout:

0.08 mm (0.003 in)

4) If either runout exceeds the limit, move the
phase of companion flange and drive pinion 90

°

each, and find the point that the runout is within the
limit.
5) If the runout exceeds the limit after changing the
phase, replace the companion flange and recheck
the runout.
6) If the runout exceeds the limit after replacing the
companion flange, the drive pinion may be assem-
bled incorrectly or bearing is faulty.

F: ADJUSTMENT

1. SIDE GEAR BACKLASH

Adjust the side gear backlash. (VA1-type)
<Ref. to DI-55, ASSEMBLY, Rear Differential (VA-
type).>

2. HYPOID DRIVEN GEAR BACKLASH

Adjust hypoid driven gear backlash.
<Ref. to DI-55, ASSEMBLY, Rear Differential (VA-
type).>

3. TOOTH CONTACT BETWEEN HYPOID 
DRIVEN GEAR AND DRIVE PINION

Adjust the tooth contact between hypoid driven
gear and drive pinion gear.
<Ref. to DI-55, ASSEMBLY, Rear Differential (VA-
type).>

DI-00360

DI-00361

DI-72

DIFFERENTIALS

Rear Differential Front Oil Seal

6. Rear Differential Front Oil 

Seal

A: INSPECTION

Make sure that there is no leakage from front oil
seal portion. If there is any leakage, replace the oil
seal and inspect the propeller shaft.

B: REPLACEMENT

1) Disconnect the ground cable from battery.
2) Move the select lever or gear shift lever to neu-
tral.
3) Release the parking brake.
4) Remove the oil drain plug, and drain gear oil.
• Except for VA2-type

• VA2-type

5) Install the oil drain plug.

NOTE:
• Apply liquid gasket to the oil drain plug for T-type.
• Use a new aluminum gasket for VA1-type.
• Use a new metal gasket for VA2-type.

Liquid gasket:

THREE BOND 1105 (Part No. 004403010) or 
equivalent

Tightening torque:

T-type

49 N

⋅

m (5.0 kgf-m, 36.2 ft-lb)

VA1-type

34 N

⋅

m (3.5 kgf-m, 25.3 ft-lb)

For VA2-type

29 N

⋅

m (3.0 kgf-m, 21.4 ft-lb)

6) Lift-up the vehicle.
7) Remove the rear exhaust pipe and muffler.
8) Remove the propeller shaft. <Ref. to DS-10, RE-
MOVAL, Propeller Shaft.>
9) Remove the self-locking nut while holding the
companion flange with ST.
ST

498427200

FLANGE WRENCH

10) Extract the companion flange using ST.
ST

399703600

PULLER ASSY

11) Remove the oil seal using ST or screwdriver.
ST

398527700

PULLER ASSY

(A) Filler plug

(B) Drain plug

(A) Filler plug

(B) Drain plug

DI-00356

(A)

(B)

(A)

DI-00357

(B)

DI-00194

ST

DI-00196

ST

DI-00197

ST

DI-73

DIFFERENTIALS

Rear Differential Front Oil Seal

12) Install a new oil seal using ST.
ST

498447120

INSTALLER

13) Install the companion flange.

NOTE:
Use a plastic hammer to install companion flange.
14) Tighten the self-locking nut within the specified
torque range so that the turning resistance of com-
panion flange becomes the same as that of before
oil seal replacement.
ST

498427200

FLANGE WRENCH

NOTE:
Use a new self-locking nut.

Tightening torque:

T-type

181 N

⋅

m (18.5 kgf-m, 134 ft-lb)

VA-type

191 N

⋅

m (19.5 kgf-m, 141 ft-lb)

15) Hereafter, reassemble in the reverse order of
disassembly.

DI-00292

ST

DI-00194

ST

DI-74

DIFFERENTIALS

Rear Differential Side Oil Seal

7. Rear Differential Side Oil Seal

A: INSPECTION

Make sure that there is no leakage from side oil
seal. If there is any leakage, replace the oil seal.

B: REPLACEMENT

1) Remove the rear differential. <Ref. to DI-29, RE-
MOVAL, Rear Differential (T-type).> <Ref. to DI-46,
REMOVAL, Rear Differential (VA-type).>
2) Remove the rear differential side oil seal using a
screwdriver wrapped with vinyl tape to prevent the
side retainer from scratches.
3) Using the ST, install the oil seal to the side re-
tainer.
• T-type and VA2-type
ST

398437700

DRIFT

• VA1-type
ST

498447100

INSTALLER

4) Install the rear differential. <Ref. to DI-30, IN-
STALLATION, Rear Differential (T-type).> <Ref. to
DI-47, INSTALLATION, Rear Differential (VA-
type).>

ST

DI-00209

ST

DI-00221