Subaru Legacy (2005 year). Manual - part 670

6MT-27

MANUAL TRANSMISSION AND DIFFERENTIAL

General Description

18720AA000

REMOVER

Used for disassembling main shaft.

18654AA000

INSTALLER

Used for assembling driven shaft.

18663AA000

SOCKET

Used for removing and installing oil pump cover.

18853AA000

HEIGHT GAUGE

Used for selecting shift rod.

ILLUSTRATION

TOOL NUMBER

DESCRIPTION

REMARKS

ST18720AA000

ST18654AA000

ST18663AA000

ST18853AA000

6MT-28

MANUAL TRANSMISSION AND DIFFERENTIAL

General Description

2. GENERAL TOOL

18760AA000

CLAW

• Used for removing front side retainer bearing 
outer race.
• Used with PULLER ASSY (398527700).

18675AA000

DIFFERENTIAL 
SIDE OIL SEAL 
INSTALLER

Used for installing differential side retainer oil 
seal.

28399SA010

OIL SEAL PROTEC-
TOR

Used for protecting oil seal when installing front 
drive shaft.

TOOL NAME

REMARKS

Circuit tester

Used for measuring resistance, voltage and ampere.

ILLUSTRATION

TOOL NUMBER

DESCRIPTION

REMARKS

ST18760AA000

ST18675AA000

ST28399SA010

6MT-29

MANUAL TRANSMISSION AND DIFFERENTIAL

Transmission Gear Oil

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 and in
the proper direction.
5) Pull out the oil level gauge again, and check the
oil level. If it is below the lower level, 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) Remove the transmission under cover.
4) Drain transmission gear oil completely.

CAUTION:
Directly after the vehicle has been running or 
the engine has been long idle running, the 
transmission gear oil is hot. Be careful not to 
burn yourself.

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

Tightening torque:

Oil pan side

44 N

⋅

m (4.5 kgf-m, 32.5 ft-lb)

Clutch housing side

70 N

⋅

m (7.1 kgf-m, 51.6 ft-lb)

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

Recommended gear oil:

GL-5 or equivalent

Gear oil capacity:

4.1

2(4.3 US qt, 3.6 Imp qt)

7) Check the level of transmission gear oil.

NOTE:
• When inserting the level gauge into transmission
gear, align the protrusion on the top part of the level
gauge with the notch in the gauge hole.
• The gear oil level should be within the range
marked on the level gauge.

(A) Oil level gauge

(B) Upper level

(C) Lower level

MT-00449

(A)

(A)

(B)

(C)

(A) Drain plug (Oil pan side)

(B) Drain plug (Clutch housing side)

(A)

(B)

MT-00450

6MT-30

MANUAL TRANSMISSION AND DIFFERENTIAL

Oil Seal

3. Oil Seal

A: INSPECTION

Check the leakage of gear oil from oil seal part.
Perform the following procedure if the oil seal is de-
formed, hardened, worn or defective in any way.
• Replace the oil seal.
• Check the propeller shaft. 

B: REPLACEMENT

1) Clean the transmission exterior.
2) Drain gear oil completely.

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

Tightening torque:

Oil pan side

44 N

⋅

m (4.5 kgf-m, 32.5 ft-lb)

Clutch housing side

70 N

⋅

m (7.1 kgf-m, 51.6 ft-lb)

3) Remove the rear exhaust pipe and muffler.
4) Remove the propeller shaft. <Ref. to DS-10, RE-
MOVAL, Propeller Shaft.>
5) Using the ST, remove the oil seal.
ST

398527700

PULLER ASSY

6) Using the ST, install the oil seal.
ST

498057300

INSTALLER

7) Install the propeller shaft. <Ref. to DS-11, IN-
STALLATION, Propeller Shaft.>
8) Install the rear exhaust pipe and muffler.
9) Pour gear oil and check the oil level. <Ref. to
6MT-29, REPLACEMENT, Transmission Gear
Oil.>

(A) Drain plug (Oil pan side)

(B) Drain plug (Clutch housing side)

(A) Oil seal

(A)

(B)

MT-00450

MT-00451

(A)

ST

MT-01299

ST