Subaru Legacy III (2000-2003 year). Manual - part 534

AT-30

AUTOMATIC TRANSMISSION

AUTOMATIC TRANSMISSION FLUID

2. Automatic Transmission Flu-

A: INSPECTION

CAUTION:
The level of ATF varies with fluid temperature.
Pay attention to the fluid 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 AT-

21, READ CURRENT DATA, OPERATION,
Subaru Select Monitor.>
2) Make sure the vehicle is level.
3) After selecting all positions (P, R, N, D, 3, 2, 1),
set the select lever in “P” range. Measure the ATF
level with the engine idling for one or two minutes.

4) Make sure that ATF level is above the center of
upper and lower marks.

NOTE:
When the transmission is hot, the level should be
above the center of upper and lower marks, and
when it is cold, the level should be found below the
center of these two marks.
5) If the ATF level is below the center between up-
per and lower marks, add the recommended ATF
until the ATF level is found above the center be-
tween upper and lower marks.

CAUTION:
• Use care not to exceed the upper limit level.
• Remember that the addition of ATF to the up-
per limit mark when the transmission is cold
will result in overfilling of ATF, causing a trans-
mission failure.
6) Check ATF level after raising ATF temperature
to 70 — 80

C (158 — 176

F) by running the vehicle

or by idling the engine again.
7) Check the ATF for leaks.

Check for leaks in the transmission. If there are
leaks, it is necessary to repair or replace gasket, oil
seals, plugs or other parts.

B: REPLACEMENT

1) Lift-up the vehicle.
2) Drain the ATF completely.

CAUTION:
Directly after the engine has been running, the
ATF is hot. Be careful not to burn yourself.
3) Replace with a new gasket, and then tighten the
ATF drain plug.

Tightening torque:

25 N·m (2.5 kgf-m, 18.1 ft-lb)

4) Lower the vehicle.
5) Pour ATF into the oil charge pipe.

Recommended fluid:

Dexron III type automatic transmission flu-
id

Capacity:

Fill the same amount of ATF drained from
drain plug hole.

Capacity when transmission is overhauled:

2.0 L non-TURBO model:

8.4 — 8.7

(8.9 — 9.2 US qt, 7.4 — 7.7 Imp

qt)

Except 2.0 L non-TURBO model:

9.3 — 9.6

(9.8 — 10.1 US qt, 8.2 — 8.4 Imp

qt)

6) Check the level and leaks of ATF.
<Ref. to AT-30, INSPECTION, Automatic Trans-
mission Fluid.>

(A) ATF level gauge

(B) Upper level

AT-00674

COLD

HOT

( C )

( B )

( A )

(A) Oil pan

(B) Drain plug (ATF)

AT-00016

( A )

( B )

( C )

AT-31

AUTOMATIC TRANSMISSION

DIFFERENTIAL GEAR OIL

3. Differential Gear Oil

A: INSPECTION

1) Park the vehicle on a level surface.
2) Remove the oil level gauge and wipe it clean.
3) Reinsert the level gauge all the way. Be sure that
the level gauge is correctly inserted and in the
proper orientation.
4) Remove it again and note the reading. If the dif-
ferential gear oil level is below the “L” line, add oil to
bring the level up to the “F” line.
5) To prevent overfilling the differential gear oil, do
not add oil above the “F” line.

B: REPLACEMENT

1) Lift-up the vehicle.
2) Drain the differential gear oil completely.

CAUTION:
• Directly after the engine has been running,
the 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 camplete-
ly.
3) Replace the gasket with a new one, and then
tighten the differential gear oil drain plug.

Tightening torque:

44 N·m (4.5 kgf-m, 32.5 ft-lb)

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

Recommended fluid:

Use GL-5 (SAE: 80W — 90) or equivalent.

Gear oil capacity:

1.1 — 1.3

(1.2 — 1.4 US qt, 1.0 — 1.1 Imp

qt)

6) Check the level of differential gear oil.
<Ref. to AT-31, INSPECTION, Differential Gear
Oil.>

(A) Upper level

(B) Lower level

AT-00017

( A )

( B )

(A) Oil pan

(B) Drain plug

AT-00016

( A )

( B )

( C )

AT-32

AUTOMATIC TRANSMISSION

ROAD TEST

4. Road Test

A: INSPECTION

1. GENERAL PRECAUTION

Road tests should be conducted to properly diag-
nose the condition of the automatic transmission.

NOTE:
When performing the test, do not exceed posted
speed limit.

2. D RANGE SHIFT FUNCTION

Check shifting between 1st

⇔

2nd

⇔

3rd

⇔

4th

while driving on normal city streets.

3. D RANGE SHIFT SHOCK

Check the shock level when shifting up during nor-
mal driving.

4. KICK-DOWN FUNCTION

Check kick-down for each gear. Also check the
kick-down shock level.

5. ENGINE BRAKE OPERATION

• Check the 3rd gear engine brake when shifting
between D

⇔

3rd range while driving in 4th gear of

D range [50 to 60 km/h (31 to 37 MPH)].
• Check the 2nd gear engine brake when shifting
between 3

⇔

2 range while driving in the 3 range

3rd gear [40 to 50 km/h (25 to 31 MPH)].
• Check the 1st gear engine brake when shifting
between 2

⇔

1 range while driving in the 2 range

2nd gear [20 to 30 km/h (12 to 19 MPH)].

6. LOCK-UP FUNCTION

Check that engine speed does not change sharply
when the acclelerator pedal is lightly depressed
when driving on flat roads at normal speed in the
lock-up range.

7. P RANGE OPERATION

Stop the vehicle on an uphill grade of 5% or more
and shift to “P” range. Check that the vehicle does
not move when the parking brake is released.

8. UNUSUAL SOUNDS AND VIBRATION

Check for unusual sounds and vibration while driv-
ing and during shifting.

9. CLIMBING CONTROL FUNCTION

• Check that the gear remains in 3rd when going
up a grade.
• Check that the gear remains in 3rd when apply-
ing the brakes while going down a grade.

10.TRANSFER CLUTCH

Check if the tight corner braking occurs when the
vehicle is started with steering wheel held at fully
turned position.

11.OIL LEAKS

After the driving test, inspect for oil leaks.

AT-33

AUTOMATIC TRANSMISSION

STALL TEST

5. Stall Test

A: INSPECTION

1. GENERAL INFORMATION

The stall test is of extreme importance in diagnos-
ing the condition of the automatic transmission and
the engine. It should be conducted to measure the
engine stall speeds in “R” and “2” ranges.
Purposes of the stall test:
1) To check the operation of the automatic trans-
mission clutch.
2) To check the operation of the torque converter
clutch.
3) To check engine performance.

2. TEST METHODS

1) Preparations before test:

(1) Check that throttle valve opens fully.
(2) Check that engine oil level is correct.
(3) Check that coolant level is correct.
(4) Check that ATF level is correct.
(5) Check that differential gear oil level is cor-
rect.
(6) Increase ATF temperature to 70 to 80

(158 to 176

F) by idling the engine for approx.

30 minutes (with select lever set to “N” or “P”).

2) Place the wheel chocks at the front and rear of
all wheels and engage the parking brake.
3) Move the manual linkage to ensure it operates
properly, and shift the select lever to the “2” range.
Turn hold switch ON.
4) While forcibly depressing the foot brake pedal,
gradually depress the accelerator pedal until the
engine operates at full throttle.

5) When the engine speed is stabilized, record that
speed quickly and release the accelerator pedal.
6) Shift the select lever to “N” range, and cool down
the engine by idling it for more than one minute.
7) If the stall speed in “2” range is higher than spec-
ifications, low clutch slipping and 2-4 brake slipping

may occur. To identify it, conduct the same test as
above in “R” range.
8) Perform the stall tests with the select lever in “D”
range. Turn hold switch OFF.

NOTE:
• Do not continue the stall test for MORE THAN 5
SECONDS at a time (from closed throttle, fully
open throttle to stall speed reading). Failure to fol-
low this instruction causes the engine oil and ATF
to deteriorate and the clutch and brake to be ad-
versely affected.
• Be sure to cool down the engine for at least 1
minute after each stall test with the select lever set
in the “P” or “N” range and with the idle speed lower
than 1,200 rpm.
• If the stall speed is higher than the specified
range, attempt to finish the stall test in as short a
time as possible, in order to prevent the automatic
transmission from sustaining damage.

Stall speed (at sea level):

2.0 L non-TURBO model:

2,000 — 2,500 rpm

2.5 L and 3.0 L models:

2,100 — 2,600 rpm

2.0 L TURBO model:

2,600 — 3,500 rpm

(A) Brake pedal

(B) Accelerator pedal

AT-00449

( A )

( B )

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