Page 2019 of 2453
5AT-3
General Description
AUTOMATIC TRANSMISSION
8. COOLING AND HARNESS
9. TRANSFER
10.FINAL REDUCTION GEAR
11.RECOMMENDED GEAR OIL
Cooling systemLiquid-cooler incorporated in
radiator
Tr a n s m i s s i o n h a r n e s s 2 0 + 8 p o l e s
Tr a n s f e r t y p eVa r i a b l e t o r q u e d i s t r i b u t i o n
(VTD)
Number of transfer clutch
drives & driven plates4
Reduction gear ratio 1.000 (41/41)
Fr o nt f in a l r e du ct i o n g ea r
ratio3.583
Lubrication oil
(1) Item (3) API standard
(2) Front differential gear oil (4) SAE viscosity No. and applicable
temperature
Fr o nt d if fer e nt i a l g ea r oi l c a pa ci t y
2(US qt, Imp qt)1.3 — 1.5 (1.4 — 1.6, 1.1 — 1.3)
MT-00001
(1)
(4)GL-5(3)
(2)
( C)( F)-30 -26 -15 15
9085W80W75W -90
25 30 -5 0-22-1523328659775
Page 2020 of 2453

5AT-4
General Description
AUTOMATIC TRANSMISSION
B: COMPONENT
1. TORQUE CONVERTER CLUTCH & TRANSMISSION ASSEMBLY
(1) Torque converter ASSY (15) Oil charge pipe (29) Nipple
(2) Circlip (16) O-ring (30) O-ring
(3) Oil pump shaft (17) Gasket (31) Oil seal
(4) Differential oil level gauge (18) Union screw (32) Dust cover
(5) Pitching stopper bracket (19) Ball (33) Floating bracket
(6) Differential oil drain plug (20) Spring (34) Turbine speed sensor 1
(7) Gasket (21) Union screw
(8) Oil seal (22) ATF outlet pipeTightening torque: N·m (kgf-m, ft-lb)
(9) Lock plate (23) ATF inlet pipeT1: 5 (0.5, 3.7)
(10) Side retainer (24) MagnetT2: 20 (2.0, 14.8)
(11) O-ring (25) Oil panT3: 25 (2.5, 18)
(12) Oil Seal (26) GasketT4: 40 (4.1, 29.5)
(13) ATF level gauge (27) ATF drain plugT5: 45 (4.6, 33.2)
(14) O-ring (28) Breather hoseT6: 70 (7.1, 51.6)
T6
T4
T3
T5
T1
T2
T4
T3
(12)
(11)
(7)(6)
(10)
(21)
(20)
(23)
(26)
(25)(24)(27)
(30)
(19)(22)
(18)
(17)
(34)
(32)
(16)
(15)
(14)
(13)
(28)
(4)
(5)
(1)
(2)(3)
(8)
(29)
(33)
(31)
(9)
(17)
AT-03368
Page 2026 of 2453
5AT-10
General Description
AUTOMATIC TRANSMISSION
7. DIFFERENTIAL GEAR
(1) Retainer plate RH (6) Hypoid driven gear (11) Differential case LH
(2) Differential side retainer RH (7) Drive pinion shaft (12) Differential bevel gear
(3) O-ring (8) Pinion shaft (13) Washer
(4) Oil seal (9) Straight pin (14) Differential bevel pinion
(5) Taper roller bearing (10) Differential case RH (15) Differential side retainer LH
AT-03008
(1)
(7)
(8)
(13)(12)
(12)
(14)
(13)
(1)
(2)
(3)
(5)
(10)
(6)
(9)
(11)
(5)
(3)
(15)
(4)
(4)
(14)
Page 2035 of 2453
5AT-19
General Description
AUTOMATIC TRANSMISSION
398527700 PULLER ASSY • Used for removing the extension case roller
bearing.
•Used for removing the extension oil seal.
•Used for removing the front differential side
retainer bearing outer race.
•Used for removing the front differential side
retainer oil seal.
498057300 INSTALLER Used for installing the extension oil seal.
498077000 REMOVER Used for removing the differential taper roller
bearing.
18630AA010 WRENCH COMPL
RETAINER
Used for removing and installing the differential
side retainer.
398487700 DRIFT Used for installing the front differential taper
roller bearing.
ILLUSTRATION TOOL NUMBER DESCRIPTION REMARKS
ST-398527700
ST-498057300
ST-498077000
ST18630AA010
ST-398487700
Page 2038 of 2453
5AT-22
General Description
AUTOMATIC TRANSMISSION
18482AA010 CARTRIDGE Troubleshooting for the electrical system.
22771AA030 SUBARU SELECT
MONITOR KIT
Tr o u b l e s h o o t i n g f o r t h e e l e c t r i c a l s y s t e m .
18675AA000 DIFFERENTIAL
SIDE OIL SEAL
INSTALLER
Used for installing the differential side retainer oil
seal.
18654AA000 INSTALLER Used for removing and installing the ball bearing.
28399SA010 OIL SEAL PROTEC-
TOR
Used for protecting oil seal when installing front
drive shaft.
ILLUSTRATION TOOL NUMBER DESCRIPTION REMARKS
ST18482AA010
ST22771AA030
ST18675AA000
ST18654AA000
ST28399SA010
Page 2041 of 2453

5AT-25
General Description
AUTOMATIC TRANSMISSION
2. GENERAL TOOL
18680AA010
(Newly adopted tool)
HOLDER GEAR Used for removing reduction driven gear assem-
bly. (2-piece set)
18766AA000
(Newly adopted tool)
SUPPORT PULLER Used for removing reduction driven gear assem-
bly.
18767AA000
(Newly adopted tool)
REMOVER • Used to pull out the parking gear.
•Used to pull out the bearing from the VTD
assembly.
TO OL N AM E RE MA R KS
Depth gauge Used for measuring the transmission end play.
Thickness gauge Used for measuring clearance of the clutch, brake and oil pump.
Micrometer Used for measuring thickness of the drive pinion.
Spring balance Used for measuring the starting torque of the drive pinion.
Circuit tester Used for measuring resistance and voltage.
TO RX® T70Used 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
ST18680AA010
ST18766AA000
ST18767AA000
Page 2044 of 2453

5AT-28
Differential Gear Oil
AUTOMATIC TRANSMISSION
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. Make sure
the level gauge is inserted correctly 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
add 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:
•Immediately after the vehicle has been run-
ning or after idling for a long time, the differen-
tial gear oil will be hot. Be careful not to burn
yourself.
•Be careful not to spill differential gear oil on
the exhaust pipe to prevent it from emitting
smoke or causing a fire. If differential gear oil is
spilled on the exhaust pipe, wipe it off com-
pletely.
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 into the gauge hole.
Recommended gear oil:
SPECIFICATION, General Description.>
Gear oil capacity:
1.3 — 1.5 2 ( 1 . 4 — 1 . 6 U S q t , 1 . 1 — 1 . 3 I m p q t )
6) Check the level of differential gear oil.
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)
Page 2046 of 2453

5AT-30
Stall Test
AUTOMATIC TRANSMISSION
5. Stall Test
A: INSPECTION
NOTE:
The stall test is extremely important in diagnosing
the condition of an automatic transmission and en-
gine. It should be conducted to measure the engine
stall speeds in “R” and “2nd of manual mode”.
Purposes of the stall test:
•Operational check of the automatic transmission
clutch
•Operational check of the torque converter clutch
•Engine performance check
1) Check that the throttle valve fully opens.
2) Check that the engine oil level is correct.
3) Check that the coolant level is correct.
4) Check that the ATF level is correct.
5) Check that the differential gear oil level is cor-
rect.
6) Raise the ATF temperature to 70 to 80°C (158 to
176°F) by driving a distance of 5 to 10 km (3 to 6
miles). Confirm the ATF temperature on Subaru
Select Monitor.
RENT DATA, OPERATION, Subaru Select Moni-
tor.>
7) Place the wheel chocks at the front and rear of
all wheels and apply the parking brake.
8) Move the select lever to ensure it operates prop-
erly, and then set to the “2nd gear of manual
mode”.
9) While stepping hard on the brake pedal, gradu-
ally step on the accelerator pedal.
10) When the engine speed is stabilized, quickly
record the engine speed and release accelerator
pedal.
11) Shift the select lever to “N” range, and cool
down the engine by idling it for more than one
minute.
12) Perform the procedure for “R” range in the
same way as “2nd on manual mode”.
NOTE:
•Do not continue the stall test for MORE THAN
FIVE SECONDS at a time (from fully closed throttle
to fully open throttle until stall speed reading). Do-
ing so will make the engine oil and ATF deteriorate
and the clutch and brake to be adversely affected.
•After performing the stall test, be sure to cool
down the engine for at least one minute with the se-
lect lever set in “P” or “N” range, and at an idle
speed of 1,200 rpm or less.
•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):
2,300 — 2,800 rpm
AT-03297
Stall speed (at sea level) Range Possible faulty part
Below specified value R•Engine
•One-way clutch of torque converter clutch
Over specified value
2nd gear of manual
mode
•Line pressure too low
•Forward brake
•Forward brake one-way clutch
•Direct clutch
•3rd one-way clutch
R•Line pressure too low
•Reverse clutch