Subaru Impreza 3 / Impreza WRX / Impreza WRX STI. Manual — part 431

6MT-61

Transmission Case

MANUAL TRANSMISSION AND DIFFERENTIAL

4) By inspecting from the pilot bolt attachment hole,

check that the interlock block and the reverse inter-

lock block are aligned to the neutral position. If not

aligned, remove the transmission case, and shift

the shifter fork and interlock block to the neutral po-

sition.

5) Use a new gasket to temporarily attach the pilot

bolt.

6) Affix the transmission case with the bolts and

nuts.
Tightening torque:

50 N·m (5.1 kgf-m, 36.9 ft-lb)

7) Tighten the pilot bolt.
Tightening torque:

34 N·m (3.5 kgf-m, 25.1 ft-lb)

8) Tighten the holder reverse bolt.
Tightening torque:

25 N·m (2.5 kgf-m, 18.4 ft-lb)

9) Install the snap ring and washer for the main

shaft assembly, and washer and collar for the driv-

en gear assembly.

10) Install the transfer bearing holder.
Tightening torque:

25 N·m (2.5 kgf-m, 18.4 ft-lb)

ST 18663AA000 SOCKET

11) When replacing the transfer bearing holder, se-

lect the appropriate transfer driven gear and adjust-

ing washer, and install to the extension case. <Ref.

to 6MT-45, ADJUSTMENT, Extension Case.>

(A) Interlock block
(B) Reverse interlock block

MT-00533

(A)

(B)

(A) Washer
(B) Snap ring

(C) Collar
(D) Washer

(C)

(B)

(A)

(C)

(B)

(D)

(A)

MT-01621

MT-01619

6MT-62

Transmission Case

MANUAL TRANSMISSION AND DIFFERENTIAL

12) Install the selector arm No. 2, shifter arm, se-

lector plunger and spring.

13) Install a new straight pin.

14) Using the ST, install the neutral set spring.

ST1 18756AA000

CLAW

ST2 399893600

PLIER

15) Install the snap ring and flat washer to the se-

lector arm area.

16) Install the oil guides G and H.

17) Install the center differential. <Ref. to 6MT-57,

INSTALLATION, Center Differential.>

18) Install the transfer driven gear. <Ref. to 6MT-

55, INSTALLATION, Transfer Driven Gear.>

19) Install the extension case. <Ref. to 6MT-43, IN-

STALLATION, Extension Case.>

20) Install the neutral position switch, back-up light

switch and harness. <Ref. to 6MT-41, INSTALLA-

TION, Neutral Position Switch.> <Ref. to 6MT-39,

INSTALLATION, Back-up Light Switch.>

21) Install the manual transmission assembly to the

vehicle. <Ref. to 6MT-33, INSTALLATION, Manual

Transmission Assembly.>

(A) Selector arm No. 2
(B) Shifter arm

(C) Selector plunger

MT-02713

(B)

(A)

(C)

MT-01092

ST2

ST1

(A) Snap ring
(B) Flat washer

(A) Oil guide G
(B) Oil guide H

MT-01616

(B)

(A)

MT-01728

(A)

(B)

6MT-63

Transmission Case

MANUAL TRANSMISSION AND DIFFERENTIAL

C: DISASSEMBLY

1) Remove the transmission harness from the

transmission case.
NOTE:

Remove the connector by disengaging the connec-

tor claw from the inside of the transmission.

2) Remove the oil guides C, D, E, F and harness

bracket.

3) Remove the oil pan.

4) Remove any remaining liquid gasket from the

transmission case and oil pan.

D: ASSEMBLY

1) Apply liquid gasket to the oil pan.
Liquid gasket:

THREE BOND 1215 (Part No. 004403007) or

equivalent

2) Install the oil pan.
Tightening torque:

6.4 N·m (0.7 kgf-m, 4.7 ft-lb)

(A) Oil guide C
(B) Oil guide D

(C) Oil guide E
(D) Oil guide F

(E) Harness bracket

(A)

(B)

(C)

(D)

MT-01712

(E)

MT-01831

MT-00541

MT-01831

6MT-64

Transmission Case

MANUAL TRANSMISSION AND DIFFERENTIAL

3) Install the oil guides C, D, E, F and harness

bracket.
Tightening torque:

T1: 16 N·m (1.6 kgf-m, 11.8 ft-lb)

T2: 18 N·m (1.8 kgf-m, 13.3 ft-lb)

4) Attach the transmission harness to the transmis-

sion.
NOTE:

Install the transmission harness connector by align-

ing the protrusions of the transmission and trans-

mission harness connector.

E: INSPECTION

1) If the sludge is accumulated in the oil pan, use a

waste cloth to wipe it off completely.

2) Check that there is no damage on any parts. Re-

place damaged parts with new parts.

(A) Oil guide C
(B) Oil guide D

(C) Oil guide E
(D) Oil guide F

(E) Harness bracket

(A)

(B)

(C)

(D)

MT-01713

(E)

T1

T2

(A) Protrusion
(B) Transmission harness connectors

MT-01777

(B)

(A)