Subaru XT 1988 Service Manual page 688

AUTOMATIC TRANSMISSION AND DIFFERENTIAL
3-2
Interpretation of stall test results
Stall speed
Assessment Cause Remarks
(at sea level)
Higher than Slippage of automatic transm"is-
•
Low line pressure (If stall
* 1: Slippage of reverse clutch/
2,850 rpm
sion clutch, brake band, etc_ speed is higher than speci- low & reverse brake can be
(1800 cc)
(Further stall tests are not fied range at any shift posi-
judged by road tests.
or necessary.)
tion). If engine compression can
2,800 rpm
• One-way clutch slippage.
be used as a brake with
(2700 cc)
(If stall speed is higher than
select lever in the 1 range,
specified range only in the reverse clutch is slipping; if
D range.)
it cannot be used, low
&
• Slippage of Forward clutch.
reverse brake is slipping.
(If stall speed is higher than
specified range in D, 3, 2,
1ST Hold range.
•
* 1: SI ippage of low &
reverse brake or reverse
clutch.
(If stall speed is higher
than specified range
only in the R range.)
2,450 - 2,850
• Control members are in
• One-way clutch can be
rpm
good order in the D, 3, 2
checked for condition by
(1800cc)
and R ranges.
road tests. * *
or
•
Engine in good order.
2,400 - 2,800
rpm
(2700 cc)
Lower than
• Throttle not fully opened.
2,450 rpm •
Erroneous engine operation
(1800 cc)
or torque converter one-
or
way clutch slippage.
2,400 rpm
(2700 cc)
** Road test
• Acceleration is not properly One-way clutch slippage. *3: Abnormal temperature
made up to 50 km/h *3: One-way clutch jamming.
rise occurs.
(31 MPH).
Erroneous engine operation.
• Car speed does not attain
more than 80 km/h
(50 MPH).
• Operation is not proper at
all car speeds.
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