Page 2039 of 2453
5AT-23
General Description
AUTOMATIC TRANSMISSION
18763AA000 COMPRESSOR
SHAFT
Used for disassembling multi-plate clutch for shift
transmission.
18765AA000 COMPRESSOR
SUPPORT
Used for disassembling multi-plate clutch for shift
transmission.
18676AA020TORX® WRENCHUsed for disassembling torque converter case.
18854AA000 ANGLE GAUGE Used for tightening parking support.
498077300 REMOVER Used for removing ball bearing of reduction
driven gear.
ILLUSTRATION TOOL NUMBER DESCRIPTION REMARKS
ST18763AA000
ST18765AA000
ST18676AA020
ST18854AA000
ST-498077300
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 2045 of 2453

5AT-29
Road Test
AUTOMATIC TRANSMISSION
4. Road Test
A: INSPECTION
1. GENERAL PRECAUTION
Road tests should be conducted to properly diag-
nose the condition of 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 ←→ 5th 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. Check the shock
level during kick–down at the same time.
5. ENGINE BRAKE OPERATION
•Check the 4th gear engine brake when shifting
down from 5th to 4th range while driving in 5th gear
of manual mode [50 to 60 km/h (31 to 37 MPH)].
•Check the 3rd gear engine brake when shifting
down from 4th to 3rd range while driving in 4th gear
of manual mode [50 — 60 km/h (31 — 37 MPH)].
•Check the 2nd gear engine brake when shifting
down from 3rd to 2nd range while driving in 3rd
gear of manual mode [40 — 50 km/h (25 — 31
MPH)].
•Check the 1st gear engine brake when shifting
down from 2nd to 1st range while driving in 2nd
gear of manual mode [20 — 30 km/h (12 — 19
MPH)].
6. P RANGE OPERATION
Stop the vehicle on an uphill grade of 5% or more
and shift to the “P” range. Check that the vehicle
does not move when the parking brake is released.
7. NOISE AND VIBRATION
Check for noise and vibration while driving and dur-
ing shifting.
8. OIL LEAKAGE
After the driving test, inspect for oil leaks from the
transmission body.
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
Page 2079 of 2453

5AT-63
Extension Case
AUTOMATIC TRANSMISSION
24.Extension Case
A: REMOVAL
1) Remove the transmission assembly.
sion Assembly.>
2) Remove the rear vehicle speed sensor.
3) Remove the extension case.
B: INSTALLATION
1) Attach the selected reduction driven gear shim
to end surface of reduction driven gear with vase-
line.
Driven Gear.>
2) Install the extension case.
NOTE:
Use a new gasket.
Tightening torque:
25 N·m (2.5 kgf-m, 18 ft-lb)
3) Install the rear vehicle speed sensor.
Tightening torque:
7 N·m (0.7 kgf-m, 5.2 ft-lb)
4) Install the transmission assembly.
Transmission Assembly.>
C: DISASSEMBLY
1) Take out the transfer clutch and multi-plate
clutch hub assembly by lightly tapping the end of
rear drive shaft.
NOTE:
Be careful not to damage the oil seal of the exten-
sion.
2) Remove the snap ring using the ST and press.
ST 18762AA000 COMPRESSOR SPECIAL
TOOL
3) Supply compressed air to remove the clutch pis-
ton.
4) Remove the dust cover from extension case.
5) Remove the oil seal from the extension case.
AT-03225
AT-03226
AT-03226
AT-03225
AT-03228
ST
AT-03229
Page 2081 of 2453

5AT-65
Transfer Clutch
AUTOMATIC TRANSMISSION
25.Transfer Clutch
A: REMOVAL
1) Remove the transmission assembly from vehicle
body.
Transmission Assembly.>
2) Remove the extension case, and then remove
the transfer clutch.
Extension Case.>,
BLY, Extension Case.>
B: INSTALLATION
1) Select the rear drive shaft shim.
ADJUSTMENT, Transfer Clutch.>
2) Select driven plate No. 3.
JUSTMENT, Transfer Clutch.>
3) Install the extension case.
STALLATION, Extension Case.>
4) Install the transmission assembly to the vehicle.
Transmission Assembly.>
C: INSPECTION
•Inspect the drive plate facing for wear and dam-
age.
•Make sure the snap ring is not worn and the re-
turn spring has no permanent distortion, damage,
or deformation.
•Check that the D-ring is not damaged.
•Inspect the extension end play, and adjust it to
within the standard value.
JUSTMENT, Transfer Clutch.>
D: ADJUSTMENT
1. REAR DRIVE SHAFT SHIM SELECTION
1) Insert the rear drive shaft into the reduction drive
gear and center differential assembly.
2) Using the ST, measure the depth “A”, which is
from mating surface of extension case to ball bear-
ing outer ring contact surface.
ST 398643600 GAUGE
3) Using the ST, measure the height “B” from the
AT main case mating surface to ball bearing outer
ring contact surface.
ST 398643600 GAUGE
4) Calculation formula:
When clearances are 0.05 mm (0.0020 in):
T (mm) = A – B + 0.23
[T (in) = A – B + 0.009]
When clearances are 0.25 mm (0.0098 in):
T (mm) = A – B +0.03
[T (in) = A – B +0.001]
A: Depth from end of extension case to ball bearing
outer ring contact surface
B: Height from end of AT main case contact surface
to the ball bearing outer ring contact surface
T: Shim thickness
Specification:
0.05 — 0.25 mm (0.0020 — 0.0098 in)
NOTE:
Calculation formula for “T” above is applied when
measuring with the ST (398643600 GAUGE).
When not using the ST,
AT-03231
AMeasured value
BMeasured value
AT-03232
A
AT-03233
B
Page 2084 of 2453

5AT-68
Reduction Driven Gear
AUTOMATIC TRANSMISSION
27.Reduction Driven Gear
A: REMOVAL
1) Remove the transmission assembly from vehicle
body.
Transmission Assembly.>
2) Remove the rear wheel speed sensor, and sep-
arate the extension case from transmission case.
3) Remove the center differential carrier.
5AT-71, REMOVAL, Center Differential Carrier.>
4) Set the range select lever to the “P” range.
5) Using ST1, ST2 and ST3, pull out the reduction
driven gear.
ST1 499737100 PULLER SET
ST2 18680AA010 GEAR HOLDER
ST3 18766AA000 SUPPORT PULLER
B: INSTALLATION
1) Set the range select lever to the “P” range.
2) Use a plastic hammer to install reduction driven
gear assembly.
3) Select the reduction gear shims.
69, ADJUSTMENT, Reduction Driven Gear.>
4) Join the transmission case and the extension
case, and then install the rear vehicle speed sen-
sor.
Case.>
5) Install the transmission assembly to the vehicle.
Transmission Assembly.>
C: DISASSEMBLY
1) Remove the ball bearing from reduction driven
gear using ST.
ST 498077300 REMOVER
2) Remove the ball bearing on the reverse side with
the same procedure as step 1).
ST 498077300 REMOVER
3) Remove the snap ring of the parking gear.
(A) Reduction driven gear
AT-03271
ST2ST1
ST2
ST3
(A)
(A) Ball bearing
(A) Ball bearing
AT-00157
(A)ST
AT-01969
(A)ST
AT-03264
Page 2085 of 2453
5AT-69
Reduction Driven Gear
AUTOMATIC TRANSMISSION
4) Using the ST, remove the parking gear.
ST 18767AA000 REMOVER
D: ASSEMBLY
1) Using the ST, install the parking gear.
ST 499755602 PRESS
2) Install the snap ring.
3) Install the new ball bearing to reduction driven
gear using press.
ST 18654AA000 INSTALLER
4) Install the ball bearing on the reverse side with
the same procedure as step 3).
ST 18654AA000 INSTALLER
E: INSPECTION
Make sure the ball bearing and gear is not de-
formed or damaged.
F: ADJUSTMENT
1) Using the ST, measure the height “A” from the
AT main case mating surface to ball bearing outer
ring contact surface.
ST 499575400 GAUGE
2) Using the ST, measure the depth “B”, which is
from mating surface of extension case to ball bear-
ing outer ring contact surface.
ST 499575400 GAUGE
(A) Ball bearing 1
AT-03265
ST
ST
AT-03264
AT-03267
ST
AT-03268
ST
AT-03269
ST
A
AT-03270
ST
B