Subaru Legacy IV (2008 year). Manual - part 781

5MT-20

General Description

MANUAL TRANSMISSION AND DIFFERENTIAL

899904100

REMOVER

Used for removing and installing the straight pin.

899988608

SOCKET WRENCH 
(27)

Used for removing and installing the drive pinion 
lock nut.

398497701

ADAPTER

• Used for installing roller bearing onto the differ-
ential case.
• Used together with the BUSHING 1-2 
INSTALLER (499277100).

499587000

INSTALLER

Used for installing the driven gears to the driven 
shaft.

498057300

INSTALLER

Used for installing the extension oil seal.

ILLUSTRATION

TOOL NUMBER

DESCRIPTION

REMARKS

ST-899904100

ST-899988608

ST-398497701

ST-499587000

ST-498057300

5MT-21

General Description

MANUAL TRANSMISSION AND DIFFERENTIAL

498255400

PLATE

Used for measuring backlash.

41099AC000

ENGINE SUPPORT 
ASSY

Used for supporting the engine.

398527700

PULLER ASSY

Used for removing the extension case roller 
bearing.

398643600

GAUGE

Used for measuring the total end play, extension 
end play and drive pinion height.

398177700

INSTALLER

• Used for installing the bearing cone of transfer 
driven gear (transfer case side).
• Used for installing the ball bearing of the trans-
fer drive gear.

ILLUSTRATION

TOOL NUMBER

DESCRIPTION

REMARKS

ST-498255400

ST41099AC000

ST-398527700

ST-398643600

ST-398177700

5MT-22

General Description

MANUAL TRANSMISSION AND DIFFERENTIAL

2. GENERAL TOOL

28399SA010

OIL SEAL 
PROTECTOR

Used for protecting the oil seal from damage 
when inserting the front drive shaft.

18675AA000

DIFFERENTIAL 
SIDE OIL SEAL 
INSTALLER

Used for installing the differential side retainer oil 
seal.

398791700

STRAIGHT PIN 
REMOVER 2

Used for installing and removing the straight pin.

TOOL NAME

REMARKS

Circuit tester

Used for measuring resistance, voltage and current.

TORX

®

 bit T70

Used for installing and removing the differential gear oil drain plug.

ILLUSTRATION

TOOL NUMBER

DESCRIPTION

REMARKS

ST28399SA010

ST18675AA000

ST-398791700

5MT-23

Transmission Gear Oil

MANUAL TRANSMISSION AND DIFFERENTIAL

2. Transmission Gear Oil

A: INSPECTION

1) Park the vehicle on a level surface.
2) Turn the ignition switch to OFF, and wait until the
engine cools.
3) Remove the oil level gauge and wipe it clean.
4) Reinsert the oil level gauge all the way. Be sure
that the oil level gauge is correctly inserted in the
proper direction.
5) Pull out the oil level gauge again, and check the
oil level. If it is at the lower level or less, add oil
through the oil level gauge hole to bring the level up
to the upper level.

B: REPLACEMENT

1) Pull out the oil level gauge.
2) Lift up the vehicle.
3) Using the TORX

®

 bit T70, remove the drain

plug, and drain the transmission gear oil complete-
ly.

CAUTION:
• Immediately after the engine has been run-
ning, the transmission gear oil will be hot. Be
careful not to burn yourself.
• Be careful not to spill the transmission gear
oil on exhaust pipe to prevent it from emitting
smoke or causing fires. If gear oil is spilled,
wipe it off completely.
4) Using the TORX

®

 bit T70, tighten the transmis-

sion gear oil drain plug.

NOTE:
• Tighten the drain plug of the transmission gear
oil after draining the transmission gear oil.
• Use a new gasket.

Tightening torque:

44 N·m (4.5 kgf-m, 32.5 ft-lb) (Aluminum gas-
ket)
70 N·m (7.1 kgf-m, 51.6 ft-lb) (Copper gasket)

5) Lower the vehicle.
6) Pour gear oil through the oil level gauge hole.

Recommended gear oil:

GL-5 (75W-90) or equivalent

Gear oil capacity:

3.5 

2

 (3.7 US qt, 3.1 Imp qt)

7) Measure the transmission gear oil amount, and
check that it is within the specification.

CAUTION:
When inserting the oil level gauge into the
transmission, align the protrusion on top of the
oil level gauge with the notch in the oil level
gauge hole.

(A) Oil level gauge

(B) Upper level

(C) Lower level

PM-00030

(B)

(C)

(A)

MT-01548