Subaru Legacy (2005 year). Service manual - part 671

6MT-31

MANUAL TRANSMISSION AND DIFFERENTIAL

Differential Side Retainer Oil Seal

4. Differential Side Retainer Oil 

Seal

A: INSPECTION

Inspect for oil leakage from the differential side re-
tainer oil seal. If there is oil leakage, perform the fol-
lowing procedure.
• Replace the oil seal.
• Check the front drive shaft. 

B: REPLACEMENT

1) Lift-up the vehicle.
2) Remove the front and center exhaust pipes.
<Ref. to EX(H6DO)-4, REMOVAL, Front Exhaust
Pipe.>
3) Drain the gear oil from drain plug.

CAUTION:
• Directly after the vehicle has been running or
the engine has been long idle running, the dif-
ferential gear oil is hot. Be careful not to burn
yourself.
• Be careful not to spill the differential gear oil
on exhaust pipe to prevent it from emitting
smoke or fire. When the differential gear oil is
spilled on exhaust pipe, wipe it away complete-
ly.

4) Tighten the drain plug.

NOTE:
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) Separate the front drive shaft from transmission.
<Ref. to DS-22, REMOVAL, Front Drive Shaft.>
6) Remove the differential side retainer oil seal us-
ing driver wrapped with vinyl tape or etc.
7) Using the ST, install the differential side retainer
by slightly tapping with hammer.

ST

18675AA000

DIFFERENTIAL SIDE OIL 
SEAL INSTALLER

8) Apply gear oil to the oil seal lips.
9) Set ST to side retainer.
ST

28399SA010

OIL SEAL PROTECTOR

10) Install the front drive shaft into transmission.

NOTE:
Replace the circlip of drive shaft with a new one.
11) Install the front drive shaft into transmission, re-
move the ST and insert the drive shaft securely.
ST

28399SA010

OIL SEAL PROTECTOR

12) Install the front and center exhaust pipes. <Ref.
to EX(H6DO)-5, INSTALLATION, Front Exhaust
Pipe.>
13) Lower the vehicle.
14) Pour gear oil through the oil level gauge hole.

Recommended gear oil:

<Ref. to 6MT-2, TRANSMISSION GEAR OIL, 
SPECIFICATION, General Description.>

Gear oil capacity:

4.1 

2(4.3 US qt, 3.6 Imp qt)

15) Check the level of the gear oil. <Ref. to 6MT-
29, INSPECTION, Transmission Gear Oil.>

(A) Drain plug (Oil pan side)

(B) Drain plug (Clutch housing side)

(A)

(B)

MT-00450

6MT-32

MANUAL TRANSMISSION AND DIFFERENTIAL

Transmission Mounting System

5. Transmission Mounting Sys-

tem

A: REMOVAL

1. PITCHING STOPPER

1) Disconnect the ground cable from battery.
2) Remove the air intake chamber.
<Ref. to IN(H6DO)-7, REMOVAL, Air Intake Cham-
ber.>
3) Remove the air cleaner case. <Ref. to
IN(H6DO)-5, REMOVAL, Air Cleaner Case.>
4) Remove the pitching stopper.

2. CROSSMEMBER AND CUSHION RUB-
BER

1) Disconnect the ground cable from battery.
2) Lift-up the vehicle.
3) Remove the front exhaust pipe, rear exhaust
pipe and muffler.
<Ref. to EX(H6DO)-4, REMOVAL, Front Exhaust
Pipe.> <Ref. to EX(H6DO)-7, REMOVAL, Rear Ex-
haust Pipe.> <Ref. to EX(H6DO)-9, REMOVAL,
Muffler.>
4) Remove the heat shield cover.
5) Set the transmission jack under transmission
body.

CAUTION:
Always support transmission case with a trans-
mission jack. 
6) Remove the rear crossmember.

7) Remove the rear cushion rubber.

B: INSTALLATION

1. PITCHING STOPPER

1) Install the pitching stopper.

Tightening torque:

T1: 50 N

⋅

m (5.1 kgf-m, 36.9 ft-lb)

T2: 58 N

⋅

m (5.9 kgf-m, 42.8 ft-lb)

2) Install the air cleaner case. 
<Ref. to IN(H6DO)-6, INSTALLATION, Air Cleaner
Case.>
3) Install the air intake chamber. 
<Ref. to IN(H6DO)-7, INSTALLATION, Air Intake
Chamber.>
4) Connect the ground cable to battery.

2. CROSSMEMBER AND CUSHION RUB-
BER

1) Install the rear cushion rubber.

Tightening torque:

35 N

⋅

m (3.6 kgf-m, 25.8 ft-lb)

2) Install the crossmember.

Tightening torque:

T1: 70 N

⋅

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

T2: 140 N

⋅

m (14.3 kgf-m, 103 ft-lb)

3) Remove the transmission jack.
4) Install the front exhaust pipe, rear exhaust pipe
and muffler. <Ref. to EX(H6DO)-5, INSTALLA-
TION, Front Exhaust Pipe.> <Ref. to EX(H6DO)-7,
INSTALLATION, Rear Exhaust Pipe.> <Ref. to
EX(H6DO)-9, INSTALLATION, Muffler.>

MT-01303

MT-01264

MT-01281

T1

T2

MT-01265

T1

T2

T2

T1

6MT-33

MANUAL TRANSMISSION AND DIFFERENTIAL

Transmission Mounting System

C: INSPECTION

Perform the following inspection procedures and
repair or replace defective parts.

1. PITCHING STOPPER

Check the pitching stopper for bends or damage.
Check that the rubber is not stiff, cracked or other-
wise damaged.

2. CROSSMEMBER AND CUSHION RUB-
BER

Check the crossmember for bends or damage.
Check that the cushion rubber is not stiff, cracked
or otherwise damaged.

6MT-34

MANUAL TRANSMISSION AND DIFFERENTIAL

Manual Transmission Assembly

6. Manual Transmission As-

sembly

A: REMOVAL

1) Set the vehicle on a lift, then fully open the front
hood and support with stay.

NOTE:
Set the hood stay to its specified hole.
2) Disconnect the ground cable from battery.
3) Remove the collector cover.
4) Remove the air intake chamber.
<Ref. to IN(H6DO)-7, REMOVAL, Air Intake Cham-
ber.>
5) Remove the air cleaner case.
<Ref. to IN(H6DO)-5, REMOVAL, Air Cleaner
Case.>
6) Lift-up the vehicle and remove the under cover.
7) Remove the front wheels.
8) Remove the universal joint. <Ref. to PS-22, RE-
MOVAL, Universal Joint.>
9) Disconnect the engine harness connectors, and
then remove the engine hanger rear.

10) Disconnect the ground cable at upper side of
transmission case and body.

11) Remove the starter assembly. <Ref. to
SC(H4SO 2.0)-6, REMOVAL, Starter.>
12) Remove the operating cylinder from transmis-
sion.

NOTE:
Hang the removed operating cylinder with wire or
etc.

13) Remove the pitching stopper and remove the
pitching stopper bracket.

(A) Engine harness connectors

(B) Engine hanger rear

MT-01302

(B)

(A)

MT-01266

MT-01267

MT-01268