Subaru XT 1988 Service Manual page 687

3-2
AUTOMATIC TRANSMISSION AND DIFFERENTIAL
1) Install an engine tachometer at a location visible from the
driver's compartment and mark the stall speed range on the
tachometer scale.
2) Place the wheel chocks at the front and rear of all wheels
and engage the parking brake.
Wheel chock
L3·1004
Fig. 320
3) Move the manual linkage to ensure it operates properly,
and shift the select lever to the D range.
4) While forcibly depressing the foot brake pedal, gradually
depress the accelerator pedal until the engine operates at full
throttle.
P
R
N
D ~
3
2
Fig.
335
Stall
test
Brake pedal
Accelerator
pedal
L3·1005
5) When the engine speed is stabilized, read that speed quick·
Iy and release the accelerator pedal.
6)
Shift the select lever to Neutral, and cool down the engine
by idling it for more than one minute.
7)
Record the stall speed.
8) Perform the stall tests with the select lever in the 3, 2 and
R ranges.
a. 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
band 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.
b. 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):
1800
cc
2,450 - 2,850 rpm
2700
cc
2,400 - 2,800
rpm
160