Subaru Legacy (2005 year). Manual - part 582

5AT-27

AUTOMATIC TRANSMISSION

General Description

2. GENERAL TOOL

499587100

OIL SEAL 
INSTALLER

Used for installing oil seal.

499787500

ADAPTER

Used for removing and installing drive pinion lock 
nut.

499575400

GAUGE

Used for measuring height of total end play.

TOOL NAME

REMARKS

Depth gauge

Used for measuring transmission end play.

Thickness gauge

Used for measuring clearance of clutch, brake and oil pump.

Micro meter

Used for measuring thickness of drive pinion.

Spring balance

Used for measuring starting torque of drive pinion.

Circuit tester

Used for measuring resistance and voltage.

TORX

® 

T70

Used for removing and installing differential gear oil drain plug.

Snap ring pliers

Used for removing and installing each snap ring.

ILLUSTRATION

TOOL NUMBER

DESCRIPTION

REMARKS

ST-499587100

ST-499787500

ST-499575400

5AT-28

AUTOMATIC TRANSMISSION

Automatic Transmission Fluid

2. Automatic Transmission Flu-

id

A: INSPECTION

NOTE:
The level of ATF varies with fluid temperature. Pay
attention to the ATF temperature when checking
ATF level.
1) Raise the ATF temperature by driving a distance
of 5 to 10 km (3 to 6 miles). Otherwise, idle the en-
gine to raise ATF temperature to 70 — 80

°C (158

— 176

°F) on Subaru Select Monitor. <Ref. to

5AT(diag)-17, READ CURRENT DATA, OPERA-
TION, Subaru Select Monitor.>
2) Park the vehicle on a level surface.
3) After selecting all positions (P, R, N, D), set the
select lever in “P” range. Measure the ATF level
with engine idling for one or two minutes.

4) Make sure that ATF level is above the center be-
tween upper and lower marks at HOT side.
5) If the ATF level is below the center between up-
per and lower marks, add the recommended ATF
until the fluid level is found above the center be-
tween upper and lower marks.

CAUTION:
• Use care not to exceed the upper level.
• When the transmission is cold, be careful not
to add ATF to the upper level on HOT side.
Overfilling of ATF may cause oil splashing.
6) Raise the ATF temperature by driving a distance
of 5 to 10 km (3 to 6 miles). Otherwise, idle the en-
gine to raise ATF temperature to 70 — 80

°C (158

— 176

°F) on Subaru Select Monitor. <Ref. to

5AT(diag)-17, READ CURRENT DATA, OPERA-
TION, Subaru Select Monitor.>
7) Check the ATF for leaks.
Visually check for leaks in the transmission. If there
are leaks, replace the gasket, oil seal, plug or other
parts.

B: REPLACEMENT

1) Lift-up the vehicle.
2) Remove the ATF drain plug to drain ATF.

CAUTION:
Directly after the vehicle has been running, the 
ATF is hot. Be careful not to burn yourself.
3) Check the condition of ATF.
<Ref. to 5AT-29, CONDITION CHECK, Automatic
Transmission Fluid.>
4) Tighten the ATF drain plug.

NOTE:
Use a new gasket.

Tightening torque:

20 N

⋅

m (2.0 kgf-m, 14.8 ft-lb)

5) Lower the vehicle.
6) Pour ATF from the oil charge pipe.

Specified fluid:

SUBARU ATF (Part No. K0140Y0700)

Recommended fluid:

IDEMITSU ATF HP
Castrol Transmax J

NOTE:
Use of recommended fluid is permitted only on the
area where the specified fluid is not available.

Capacity:

Fill the same amount of ATF when drained.

Capacity when transmission is overhauled:

9.6 — 10.0 

2 (10.1 — 10.6 US qt, 8.4 — 8.8 Imp 

qt)

7) Check the level and leaks of ATF.
<Ref. to 5AT-28, INSPECTION, Automatic Trans-
mission Fluid.>

(A) ATF level gauge

(B) Upper level

(C) Lower level

AT-00674

COLD

LF

HOT

LF

(C)

(C)

(B)

(B)

(A)

(A) Oil pan

(B) ATF drain plug

(A)

AT-03126

(B)

5AT-29

AUTOMATIC TRANSMISSION

Automatic Transmission Fluid

C: CONDITION CHECK

NOTE:
When replacing ATF, check the inside condition of transmission body by inspecting the drained ATF.

Fluid condition

Trouble and possible cause

Corrective action

Large amount of metallic pieces are 
found.

Excessive wear of the internal of the trans-
mission body

Replace ATF and check if AT operates 
correctly.

Thick and varnish-form fluid

Burned clutch and etc.

Replace ATF and check if AT or vehicle 
for faulty.

Clouded fluid or bubbles are found in 
fluid.

Water mixed in fluid

Replace ATF and check the water enter-
ing point.

5AT-30

AUTOMATIC TRANSMISSION

Differential Gear Oil

3. Differential Gear Oil

A: INSPECTION

1) Park the vehicle on a level surface.
2) Remove the collector cover.
3) Remove the oil level gauge and wipe it clean.
4) Reinsert the level gauge all the way. Be sure that
the level gauge is correctly inserted and in the
proper orientation.
5) Remove the oil level gauge again, and check the
level of differential gear oil. If the differential gear oil
level is below “L” line, add oil to bring the level up to
“F” line.

NOTE:
To prevent overfilling the differential gear oil, do not
fill oil above the “F” line.

B: REPLACEMENT

1) Lift-up the vehicle.
2) Remove the differential gear oil drain plug using
TORX

®

 BIT T70, and then drain differential gear

oil.

CAUTION:
• Directly after the vehicle has been running,
differential gear oil is hot. Be careful not to burn
yourself.
• Be careful not to spill the differential gear oil
on exhaust pipe to prevent it from emitting
smoke or fire. When the differential gear oil is
spilled on exhaust pipe, wipe it away complete-
ly.
3) Tighten the differential gear oil drain plug using
TORX

®

 BIT T70.

NOTE:
Use a new gasket.

Tightening torque:

70 N

⋅

m (7.1 kgf-m, 51.6 ft-lb)

4) Lower the vehicle.
5) Pour gear oil through the gauge hole.

Recommended gear oil:

<Ref. to 5AT-3, RECOMMENDED GEAR OIL, 
SPECIFICATION, General Description.>

Gear oil capacity:

1.3 — 1.5 

2 (1.3 — 1.6 US qt, 1.1 — 1.3 Imp qt)

6) Check the level of differential gear oil.
<Ref. to 5AT-30, INSPECTION, Differential Gear
Oil.>

(A) Upper level

(B) Lower level

AT-00017

( A )

( B )

LF

(A) Oil pan

(B) Differential gear oil drain plug

(B)

AT-03127

(A)