Subaru Forester (2002 year). Service manual — part 4
AUTOMATIC TRANSMISSION
AT
Page
1.
General Description. . . . . . . . . . . . . . . . . . . . . .2
2.
Automatic Transmission Fluid
3.
Differential Gear Oil
4.
Road Test
5.
Stall Test. . . . . . . . . . . . . . . . . . . . . . . . . ..3
6.
Time Lag Test
7.
Line Pressure Test
8.
Transfer Clutch Pressure Test
9.
Automatic Transmission Assembly
10.
Transmission Mounting System
11.
Extension Case Oil Seal
12.
Inhibitor Switch
13.
Front Vehicle Speed Sensor
14.
Rear Vehicle Speed Sensor
15.
Torque Converter Turbine Speed Sensor
16.
Control Valve Body
17.
Shift Solenoids, Duty Solenoids and ATF Temperature Sensor
18.
ATF Filter
19.
Transmission Control Module (TCM)
20.
ATF Cooler Pipe and Hose
1. General Description
S502001
A: SPECIFICATIONS
S502001E49
1. TORQUE CONVERTER CLUTCH
S502001E4901
Model
Non-turbo model
Turbo model
Type
Symmetric, 3 element, single stage, 2
phase torque converter
Stall torque ratio
2.0 — 2.2
2.1 — 2.3
Nominal diameter
236 mm (9.29 in)
246 mm (9.69 in)
Stall speed (at
sea level)
2,000 — 2,500
rpm
2,350 — 3,150
rpm
One-way clutch
Sprague type one-way clutch
AT-2
GENERAL DESCRIPTION
Automatic Transmission
5. Stall Test
S502246
A: INSPECTION
S502246A10
2. TEST METHODS
S502246A1002
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 50 to 80°C
(122 to 176°F) by idling the engine for approxi-
mately 30 minutes (with select lever set to “N”
or “P”).
2) Install an engine tachometer at a location vis-
ible from the driver’s compartment and mark the
stall speed range on the tachometer scale.
3) Place the wheel chocks at the front and rear of
all wheels and engage the parking brake.
4) Move the manual linkage to ensure it operates
properly, and shift the select lever to the 2 range.
5) While forcibly depressing the foot brake pedal,
gradually depress the accelerator pedal until the
engine operates at full throttle.
B3M0286C
(A)
Brake pedal
(B)
Accelerator pedal
6) When the engine speed is stabilized, read that
speed quickly and release the accelerator pedal.
7) Shift the select lever to Neutral, and cool down
the engine by idling it for more than one minute.
8) Record the stall speed.
9) If stall speed in 2 range is higher than
specifications, low clutch slipping and 2-4 brake
slipping may occur. To identify it, conduct the same
test as above in D range.
10) Perform the stall tests with the select lever in
the R range.
NOTE:
쐌
Do not continue the stall test for MORE THAN
FIVE SECONDS at a time (from closed throttle,
fully open throttle to stall speed reading). Failure to
follow this instruction causes the engine oil and
ATF to deteriorate and the clutch and brake to be
adversely affected.
Be sure to cool down the engine for at least one
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.
쐌
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):
Non-turbo model: 2,000 — 2,500 rpm
Turbo model: 2,350 — 3,150 rpm
AT-3
STALL TEST
Automatic Transmission
MEMO:
AT-4
Automatic Transmission
STALL TEST
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