Mitsubishi MOTORS L200 1996, Руководство по ремонту

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AUTOMATIC TRANSMISSION –
On-vehicle Service
23-19
CONVERTER STALL TEST
23100540138
In this test, the engine maximum speed when the
torque converter stalls with the shift lever in the
“D” or “R” range is measured to check operation
of the torque converter, starter and one-way clutch
and check holding performance of the transmission
clutch (including brake).
Caution
Do not stand in front or at rear of the vehicle
during this test.
(1) Check the transmission fluid level. The fluid
temperature should be at the level after normal
operation (70 – 80
_
C). The engine coolant
temperature should also be at the level after
normal operation (80 – 90
_
C).
(2) Apply chocks to the rear wheels (right and left).
(3) Mount an engine tachometer.
(4) Apply fully the parking and service brakes.
(5) Start the engine.
(6) With the selector lever in the “D” range, fully
depress the accelerator pedal and read off the
engine maximum speed.
Standard value:
2,100 – 2,400 r/min <4G63>
2,300 – 2,600 r/min <4D56>
NOTE
When doing so, do not keep the engine running
with throttle full open for more than 5 seconds.
If two or more stall tests are needed, place
the selector lever in the “N” position and run
the engine at about 1,000 r/min to allow the
transmission fluid to cool before another stall
test.
(7) Place the selector lever in the “R” range and
perform the test as above.
JUDGEMENT OF STALL TEST RESULTS
Stall speed in
“
D” and
“
R” range is equal to each other
but lower than the nominal value.
(1) Engine output is low.
(2) Starter one-way clutch is faulty. (Faulty torque
converter is suspected if it is lower than nominal
by more than 600 r/min)
Stall speed in
“
D” range is higher than nominal. (1) Overdrive clutch slipping
(2) Overdrive one-way clutch faulty
(3) Forward clutch slipping
(4) One-way clutch No. 2 faulty
(5) Low line pressure
Stall speed in
“
R” range is higher than nominal. (1) Overdrive clutch slipping
(2) Overdrive one-way clutch faulty
(3) Direct clutch slipping
(4) Brake No. 3 slipping
(5) Low line pressure