Subaru Impreza 3 / Impreza WRX / Impreza WRX STI. Manual - part 401

5MT-25

Manual Transmission Assembly

MANUAL TRANSMISSION AND DIFFERENTIAL

23) Using a crowbar, remove the left and right front

drive shaft from the transmission.

24) Remove  the  bolts  and  nuts  which  hold  lower

side of transmission to engine.

25) Place the transmission jack under the transmis-

sion.
CAUTION:

Always  support  the  transmission  case  with  a

transmission jack.

26) Remove the front crossmember and rear cross-

member from the vehicle.

27) While  lowering  the  transmission  jack,  tighten

the turnbuckle of the ST, and incline the engine unit

rearward.

28) Remove the transmission.
NOTE:

Move the transmission jack towards the rear until

the main shaft is withdrawn from the clutch disc.

29) Separate the transmission assembly from the

transmission cushion rubber.

(A) Crowbar

MT-01017

(A)

MT-00077

MT-00078

MT-01851

5MT-26

Manual Transmission Assembly

MANUAL TRANSMISSION AND DIFFERENTIAL

B: INSTALLATION

1) Replace  the  differential  side  retainer  oil  seal.

<Ref.  to  5MT-32,  REPLACEMENT,  Differential

Side Retainer Oil Seal.>

ST 18675AA000 DIFFERENTIAL SIDE OIL 

SEAL INSTALLER

NOTE:

Be sure to replace the differential side retainer oil

seal after removing the front drive shaft.

2) Tap the transmission hanger in the rear side of

transmission with a rubber hammer to bend it until

it is in close contact with the transmission case.
CAUTION:

Do  not  apply  excessive  load  or  impact  to  the

transmission case.

3) Install  the  transmission  cushion  rubber  to  the

transmission, and tighten the bolt (A).

4) Install  the  transmission  cushion  rubber  to  the

center crossmember, and tighten the nut (B).
Tightening torque:

Bolt (A)

35 N·m (3.6 kgf-m, 25.8 ft-lb)

Nut (B)

35 N·m (3.6 kgf-m, 25.8 ft-lb)

5) Install the transmission onto the engine.

(1) Lift  up  the  transmission  gradually  using  a

transmission jack.

(2) Engage at the spline section.

NOTE:

Be  careful  not  to  hit  the  main  shaft  against  the

clutch cover.

6) While raising the transmission jack, loosen the

turnbuckle of the ST, and set the engine unit to the

original position.

7) 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, 103.3 ft-lb)

8) Take out the transmission jack.

9) Tighten the bolts and nuts which hold the lower

side of transmission to the engine.
Tightening torque:

50 N·m (5.1 kgf-m, 36.9 ft-lb)

10) Connect the transmission to the engine.

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

General Description.>

(2) 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)

ST

MT-00103

MT-01676

(A)

(A)

(B)

MT-01672

T 1

T 1

T 2

T 2

MT-00077

MT-01524

5MT-27

Manual Transmission Assembly

MANUAL TRANSMISSION AND DIFFERENTIAL

11) Remove the ST.

12) 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)

13) Lift up the vehicle.

14) Install  the  front  drive  shaft  into  the  transmis-

sion.

ST 28399SA010 OIL SEAL PROTECTOR

15) Insert the front arm ball joint into the housing

lower part, and tighten the mounting bolt.
Tightening torque:

50 N·m (5.1 kgf-m, 36.9 ft-lb)

16) Attach the stabilizer link to the front arm.
Tightening torque:

30 N·m (3.1 kgf-m, 22.1 ft-lb)

17) Attach the gear shift rod and stay.

(1) Attach the gear shift rod to the transmission.

Tightening torque:

12 N·m (1.2 kgf-m, 8.9 ft-lb)

(2) Install the stay to the transmission bracket.

Tightening torque:

18 N·m (1.8 kgf-m, 13.3 ft-lb)

MT-01226

ST

MT-00085

T2

T1

MT-02693

ST

(A) Front arm
(B) Ball joint

(A) Stay
(B) Gear shift rod

MT-01652

(B)

(A)

MT-01655

CS-00051

(A)

(B)

5MT-28

Manual Transmission Assembly

MANUAL TRANSMISSION AND DIFFERENTIAL

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

STALLATION, Propeller Shaft.>

19) Install the heat shield cover. <Ref. to EI-74, IN-

STALLATION, Heat Shield Cover.>

20) Install the hanger bracket to the transmission.

21) Install the rear exhaust pipe and muffler. <Ref.

to EX(w/o STI)-2, General Description.>

22) Install the center exhaust pipe. <Ref. to EX(w/o

STI)-2, General Description.>

23) Install the under cover. <Ref. to EI-28, INSTAL-

LATION, Front Under Cover.>

24) Install the operating cylinder.
Tightening torque:

37 N·m (3.8 kgf-m, 27.3 ft-lb)

25) Install the transmission radio ground terminal.
Tightening torque:

13 N·m (1.3 kgf-m, 9.6 ft-lb)

26) Install the engine hanger.
Tightening torque:

16 N·m (1.6 kgf-m, 11.8 ft-lb)

27) Connect the following connectors.

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

INSTALLATION, Intercooler.>

29) Connect the battery ground terminal.

30) Remove the lift arm from vehicle.

MT-01653

CL-00253

MT-01650

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

connector

(B) Rear oxygen sensor connector

AT-04582

MT-01649

(B)

(A)