Subaru Impreza 3 / Impreza WRX / Impreza WRX STI. Manual — part 493

DI-17

General Description

DIFFERENTIALS

2. GENERAL TOOL

41399FG061

SPECIAL TOOL
RING

• Used for removing and installing the rear dif-
ferential mount bushing.
• For combination of tools for removal and instal-
lation, refer to “SPECIAL TOOL ASSY
(41399FG001)”.

41399FG070

SPECIAL TOOL
NUT

• Used for removing and installing the rear dif-
ferential mount bushing.
• For combination of tools for removal and instal-
lation, refer to “SPECIAL TOOL ASSY
(41399FG001)”.

41399FG080

SPECIAL TOOL
BEARING

• Used for removing and installing the rear dif-
ferential mount bushing.
• For combination of tools for removal and instal-
lation, refer to “SPECIAL TOOL ASSY
(41399FG001)”.

41399FG091

SPECIAL TOOL
SHAFT

• Used for removing and installing the rear dif-
ferential mount bushing.
• For combination of tools for removal and instal-
lation, refer to “SPECIAL TOOL ASSY
(41399FG001)”.

TOOL NAME

REMARKS

Transmission jack

Used for removing and installing the rear differential.

Puller

Used for removing the side retainer.

Thickness gauge

Used for measuring clearance.

ILLUSTRATION

TOOL NUMBER

DESCRIPTION

REMARKS

ST41399FG061

ST41399FG070

ST41399FG080

ST41399FG091

DI-18

Differential Gear Oil

DIFFERENTIALS

2. Differential Gear Oil

A: INSPECTION

1) Disconnect the ground cable from battery.

2) Lift up the vehicle.

3) Disconnect the oil temperature switch connec-

tor. (T-type (H3))

4) Remove the filler plug or the oil temperature

switch, and then check the gear oil. Replace the

gear oil if it is contaminated, deteriorated or cloudy.

<Ref. to DI-19, REPLACEMENT, Differential Gear

Oil.>
NOTE:

Remove the oil temperature switch and adapter as

a unit.

5) Check that the gear oil level is within –5 mm (–0.2

in) from the bottom of the filler plug hole or of the oil

temperature switch hole. If the level is low, confirm

that there is no oil leakage and refill up to the bottom

of filler plug hole or the oil temperature switch hole.

• T-type (B2)

• T-type (H3)

6) Install the filler plug or the oil temperature switch.
NOTE:

• For the T-type (B2), apply liquid gasket to the

drain plug.

• For T-type (H3), use a new gasket.

• Install the oil temperature switch and adapter as

a unit.
Liquid gasket:

THREE BOND 1105 (Part No. 004403010) or

equivalent

Tightening torque:

T-type (B2)

49 N·m (5.0 kgf-m, 36.1 ft-lb)

T-type (H3)

60 N·m (6.1 kgf-m, 44.3 ft-lb)

7) Connect the oil temperature switch connector.

(T-type (H3))

8) Lower the vehicle.

9) Connect the battery ground terminal.

(A) Oil temperature switch connector

(A) Filler plug

DI-00749

(A)

DI-00711

(A)

(A) Oil temperature switch

(A) Oil temperature switch connector

DI-00750

(A)

DI-00749

(A)

DI-19

Differential Gear Oil

DIFFERENTIALS

B: REPLACEMENT

CAUTION:

• Gear oil is extremely hot just after driving. Be

wary of receiving burns.

• Be careful not to spill the differential gear oil

on exhaust pipe. If gear oil is spilled, wipe it off

completely.

1) Disconnect the ground cable from battery.

2) Lift up the vehicle.

3) Disconnect the oil temperature switch connec-

tor. (T-type (H3))

4) Remove the drain plug and filler plug or the oil

temperature switch, and drain the gear oil.
NOTE:

Remove the oil temperature switch and adapter as

a unit.

• T-type (B2)

• T-type (H3)

5) Tighten the drain plug.
NOTE:

• For the T-type (B2), apply liquid gasket to the

drain plug.

• For T-type (H3), use a new gasket.
Liquid gasket:

THREE BOND 1105 (Part No. 004403010) or

equivalent

Tightening torque:

T-type (B2)

49 N·m (5.0 kgf-m, 36.1 ft-lb)

T-type (H3)

60 N·m (6.1 kgf-m, 44.3 ft-lb)

6) Fill the differential carrier with gear oil to the bot-

tom of filler plug hole or the oil temperature switch

hole.
NOTE:

Carefully refill gear oil while watching the level. Ex-

cessive or insufficient oil must be avoided.
Recommended gear oil:
<Ref. to DI-2, SPECIFICATION, General De-

scription.>
Oil capacity:

T-type (H3)

1.0 L (1.1 US qt, 0.9 Imp qt)

T-type (B2)

0.8 L (0.8 US qt, 0.7 Imp qt)

(A) Oil temperature switch connector

(A) Filler plug
(B) Drain plug

DI-00749

(A)

DI-00522

(A)

(B)

(A) Oil temperature switch
(B) Drain plug

DI-00593

(A)

(B)

DI-20

Differential Gear Oil

DIFFERENTIALS

• T-type (B2)

• T-type (H3)

7) Install the filler plug or the oil temperature switch.
NOTE:

• For the T-type (B2), apply liquid gasket to the

drain plug.

• For T-type (H3), use a new gasket.

• Install the oil temperature switch and adapter as

a unit.
Liquid gasket:

THREE BOND 1105 (Part No. 004403010) or

equivalent

Tightening torque:

T-type (B2)

49 N·m (5.0 kgf-m, 36.1 ft-lb)

T-type (H3)

60 N·m (6.1 kgf-m, 44.3 ft-lb)

8) Connect the oil temperature switch connector.

(T-type (H3))

9) Lower the vehicle.

10) Connect the battery ground terminal.

(A) Filler plug
(B) Drain plug

(A) Oil temperature switch
(B) Drain plug

DI-00521

(A)

(B)

DI-00531

(A)

(B)

(A) Oil temperature switch connector

DI-00749

(A)