Subaru Impreza 3 / Impreza WRX / Impreza WRX STI. Service manual — part 424

6MT-33

Manual Transmission Assembly

MANUAL TRANSMISSION AND DIFFERENTIAL

25) Move the transmission to the right side of the

vehicle, and remove the joint COMPL, stay bolts

and reverse check cable.
NOTE:

If the transmission is not moved aside, the joint

COMPL and stay bolts may contact the body and

cause damage.

26) Tighten the turnbuckle of the ST to tilt the en-

gine assembly towards the back.

27) Remove the bolts and nuts holding the bottom

of transmission to the engine, and remove the

transmission from the vehicle.
NOTE:

• During removal, be careful not to hit the trans-

mission against the body when pulling towards the

rear.

• The clutch pipe and breather pipe may interfere

with each other. Remove carefully.

B: INSTALLATION

1) Set the release fork, release bearing and release

shaft to the transmission. <Ref. to CL-15, INSTAL-

LATION, Release Bearing and Lever.>

2) Replace the front differential side retainer oil

seal. <Ref. to 6MT-28, REPLACEMENT, Differen-

tial Side Retainer Oil Seal.>
NOTE:

Be sure to replace the differential side oil seal after

the procedure of removing front drive shaft from

transmission.

3) Strike and bend the transmission hanger of

transmission rear with a rubber hammer etc. so that

it gets in contact with the transmission case.
CAUTION:

Do not apply extra overload or impact to the

transmission case.

4) Install the transmission onto the engine.

5) Tighten the bolts and nuts which hold the lower

side of transmission to the engine.
NOTE:

• Make sure that the main shaft spline is complete-

ly inserted.

• Make sure that the rear end of the engine is set

low.
Tightening torque:

50 N·m (5.1 kgf-m, 36.9 ft-lb)

(A) Joint COMPL bolt
(B) Stay bolt

(C) Reverse check cable

MT-00886

(C)

(A)

(B)

MT-00463

MT-01090

MT-02303

MT-00464

6MT-34

Manual Transmission Assembly

MANUAL TRANSMISSION AND DIFFERENTIAL

6) Loosen the turnbuckle of ST to return the engine

to its original position.

7) Move the transmission to the right side of the ve-

hicle, and attach the joint COMPL, stay bolts and

reverse check cable.
Tightening torque:

T1: 12 N·m (1.2 kgf-m, 8.9 ft-lb)

T2: 32 N·m (3.3 kgf-m, 23.6 ft-lb)

8) Install the front crossmember and rear cross-

member.
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)

9) Lower the vehicle.

10) Tighten the bolts which hold the upper side of

the transmission to the engine.
Tightening torque:

50 N·m (5.1 kgf-m, 36.9 ft-lb)

11) Make sure that the release bearing is com-

pletely inserted.
NOTE:

• Push the release fork towards the operating cyl-

inder side until a clicking sound is heard. Pull the

release fork towards the engine side. If the release

fork is not in contact with the case, the setting is

complete.

• Confirm that the boot cover is set securely.

12) Install the pitching stopper bracket, return

spring bracket, and transmission radio ground ca-

ble.
Tightening torque:

41 N·m (4.2 kgf-m, 30.2 ft-lb)

13) 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)

(A) Reverse check cable

MT-01527

MT-00465

(A)

T2

T1

MT-01265

T1

T2

T2

T1

MT-01524

MT-00467

MT-01301

T1

T2

6MT-35

Manual Transmission Assembly

MANUAL TRANSMISSION AND DIFFERENTIAL

14) Install the return spring.

15) Install the clutch operating cylinder.
Tightening torque:

41 N·m (4.2 kgf-m, 30.2 ft-lb)

NOTE:

Check that the clutch hose is routed properly.

16) Install the starter assembly. <Ref. to SC(STI)-

8, INSTALLATION, Starter.>

17) Install the transmission radio ground terminal.

18) Install the secondary air combination valve.

<Ref. to EC(STI)-30, SECONDARY AIR COMBI-

NATION VALVE LH, INSTALLATION, Secondary

Air Combination Valve.>

19) Connect the following harness connectors,

then attach the engine hanger rear.

20) Lift up the vehicle.

21) Set the ST to side retainer.

ST 28399SA010 OIL SEAL PROTECTOR

22) Install the front drive shaft into the transmis-

sion.
NOTE:

Replace the circlip of drive shaft with a new part.

23) Install the front drive shaft into transmission, re-

move the ST and insert the drive shaft securely.

ST 28399SA010 OIL SEAL PROTECTOR

24) Install the ball joint of the front arm.
Tightening torque:

50 N·m (5.1 kgf-m, 36.9 ft-lb)

MT-02302

CL-00445

MT-01266

(A) Front oxygen (A/F) sensor connector
(B) Rear oxygen sensor connector

(C) Neutral position switch backup light switch con-

nector

MT-01740

(A)

(B)

(C)

FS-00106

6MT-36

Manual Transmission Assembly

MANUAL TRANSMISSION AND DIFFERENTIAL

25) Install the front stabilizer link.
Tightening torque:

45 N·m (4.6 kgf-m, 33.2 ft-lb)

NOTE:

Use a new self-locking nut.

26) Install the propeller shaft. <Ref. to DS-12, IN-

STALLATION, Propeller Shaft.>

27) Install the heat shield cover.

28) Install the center exhaust pipe. <Ref. to

EX(STI)-9, INSTALLATION, Center Exhaust

Pipe.>

29) Fill the transmission gear oil. <Ref. to 6MT-26,

REPLACEMENT, Transmission Gear Oil.>

30) Install the transmission under cover.

31) Install the intercooler. <Ref. to IN(STI)-13, IN-

STALLATION, Intercooler.>

32) Connect the battery ground terminal.

FS-00117