YH4
GRAND
VITARA
AUTOMATIC TRANSMISSION (4 A/T) 7B1-55
Check result Possible cause
Line pressure higher
than standard level in
each range
Malfunctioning regulator valve
Malfunctioning throttle valve
Maladjusted A/T throttle cable
Line pressure lower than
standard level in each
range
Defective O/D clutch
Defective oil pump
Malfunctioning throttle valve
Malfunctioning regulator value
Maladjusted A/T throttle cable
Line pressure lower than
standard level only in “D”
range
Fluid leakage from forward clutch
Defective O/D clutch
Leakage from “D” range fluid pressure cir-
cuit
Line pressure lower than
standard level only in “R”
range
Fluid leakage from direct clutch
Defective O/D clutch
Fluid leakage from reverse brake
Fluid leakage from “R” range fluid circuit
Tightening torque of transmission case plug:
17 N
.
m (1.7 kg-m, 12.0 lb-ft)
STALL TEST
This test is to check overall performance of automatic transmission
and engine by measuring stall speed at “D” and “R” ranges. Be sure
to perform this test only when transmission fluid is at normal operat-
ing temperature and its level is between FULL and LOW marks.
CAUTION:
Do not run engine at stall more than 5 seconds continu-
ously, for fluid temperature may rise excessively high.
After performing stall test, be sure to leave engine running
at idle for longer than 30 seconds before another stall test.
1) Apply parking brake and block wheels.
2) Install tachometer.
3) Start engine with select lever shifted to “P”.
4) Depress brake pedal fully.
5) Shift select lever to “D” and depress accelerator pedal fully while
watching tachometer. Read engine rpm quickly when it has be-
come constant (stall speed).
6) Release accelerator pedal immediately after stall speed is
checked.
7) In the same way, check stall speed in “R” range.
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