Subaru Impreza 3 / Impreza WRX / Impreza WRX STI. Manual - part 400

5MT-21

General Description

MANUAL TRANSMISSION AND DIFFERENTIAL

2. GENERAL TOOL

498267200

CYLINDER HEAD 
TABLE

Used for removing and installing the roller bear-
ing of the transfer case.

498267300

CYLINDER HEAD 
TABLE

Used for removing and installing the roller bear-
ing of the transfer case.

TOOL NAME

REMARKS

Circuit tester

Used for measuring resistance, voltage and current.

TORX

®

 bit T70

Used for installing and removing the drain plug.

ILLUSTRATION

TOOL NUMBER

DESCRIPTION

REMARKS

ST-498267200

ST-498267300

5MT-22

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 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) Using  the  TORX

®

  bit  T70,  remove  the  drain

plug, and drain the transmission gear oil complete-

ly.
CAUTION:

• Immediately  after  the  vehicle  has  been  run-

ning or after idling for a long time, the transmis-

sion  gear  oil  will  be  hot.  Be  careful  not  to

receive burns.

• Be careful not to spill the transmission gear

oil on the exhaust pipe, to prevent emission of

smoke  or  causing  a  fire.  If  gear  oil  is  spilled,

wipe it off completely.

4) Tighten the drain plug using TORX

®

 bit T70.

NOTE:

• Tighten  the  drain  plug  after  draining  the  trans-

mission gear oil.

• Use a new gasket.
Tightening torque:

44 N·m (4.5 kgf-m, 32.5 ft-lb) (Aluminum gas-

ket silver)

70 N·m (7.1 kgf-m, 51.6 ft-lb) (Copper gasket, 

brown)

70 N·m (7.1 kgf-m, 51.6 ft-lb) (Metal gasket, 

black)

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 L (3.7 US qt, 3.1 Imp qt)

7) Measure the transmission gear oil amount, and

check that it is within the specification.

(A) Oil level gauge
(B) Upper level

(C) Lower level

(B)
(C)

(A)

PI-00564

L

F

MT-01548

5MT-23

Manual Transmission Assembly

MANUAL TRANSMISSION AND DIFFERENTIAL

3. Manual Transmission As-

sembly

A: REMOVAL

1) Set the vehicle on a lift.

2) Open the front hood.

3) Disconnect the ground cable from battery.

4) Drain transmission gear oil completely. <Ref. to

5MT-22,  REPLACEMENT,  Transmission  Gear

Oil.>

5) Remove the intercooler. <Ref. to IN(w/o STI)-12,

REMOVAL, Intercooler.>

6) Disconnect the following connector.

7) Disconnect the transmission radio ground termi-

nal.

8) Remove the engine hanger.

9) Remove  the  starter.  <Ref.  to  SC(w/o  STI)-2,

General Description.>

10) Remove the operating cylinder from the trans-

mission, and suspend on a wire.

11) Remove the pitching stopper.

12) Set the ST.

ST 41099AC000 ENGINE SUPPORT ASSY

13) Lift up the vehicle.

14) Remove  the  center  exhaust  pipe.  <Ref.  to

EX(w/o STI)-2, General Description.>

15) Remove  the  rear  exhaust  pipe  and  muffler.

<Ref. to EX(w/o STI)-2, General Description.>
CAUTION:

When removing the exhaust pipes, make sure

that each exhaust pipe does not drop off.

(A) Neutral position switch and back-up light switch 

connector

(B) Rear oxygen sensor connector

MT-01649

(B)

(A)

MT-01650

AT-04582

CL-00253

MT-00069

MT-01226

ST

5MT-24

Manual Transmission Assembly

MANUAL TRANSMISSION AND DIFFERENTIAL

16) Remove  the  bolts  which  hold  upper  side  of

transmission to engine.

17) Remove the heat shield cover.

18) Remove the hangar bracket from the transmis-

sion.

19) Remove  the  propeller  shaft.  <Ref.  to  DS-11,

REMOVAL, Propeller Shaft.>

20) Remove the gear shift rod and the stay from the

transmission.

(1) Disconnect the stay from the transmission.

(2) Disconnect the gear shift rod from the trans-

mission.

21) Disconnect  the  stabilizer  link  from  the  front

arm.

22) Remove the bolt securing the ball joint of the

front  arm  to  the  housing,  then  separate  the  front

arms and the housing.

MT-01524

MT-01660

MT-01653

(A) Stay
(B) Gear shift rod

(A) Front arm
(B) Ball joint

MT-00075

(A)

(B)

(B)

MT-01655

MT-01652

(B)

(A)