wheel OPEL FRONTERA 1998 Workshop Manual

AUTOMATIC TRANSMISSION (AW30-40LE) 7A–63
F07RY00002
STALL TEST
The object of this test is to check the overall performance of the
transmission and engine by measuring the maximum engine
speeds at the "D" and "R" ranges.
NOTE:
(1) Perform the test at normal operation fluid temperature
(50 – 80
C or 122 – 176F).
(2) Do not continuously run this test longer than 5
seconds.
MEASURE STALL SPEED
1) Chock the four wheels.
2) Mount an engine tachometer.
3) Fully apply the parking brake.
4) Step down strongly on the brake pedal with your left foot.
5) Star t the engine.
6) Shift into the "D" range. Step all the way down on the
accelerator pedal with your right foot. Quickly read the
highest engine rpm.
7) Perform the same test in the "R" range.
EVALUATION
1) If the engine speed is the same for both ranges but lower
than the specified value:
• Engine output is insufficient.
• Stator one-way clutch is not operating properly.
NOTE:
If more than 600 rpm below the specified value, the torque
converter could be faulty.
2) If the stall speed in only "D" range is higher than specified:
• Line pressure too low
• Forward clutch slipping
• No. 2 one-way clutch not operating properly
3) If the stall speed in only "R" range is higher than specified:
• Line pressure too low
• Direct clutch slipping
• No. 3 brake slipping
4) If the stall speed in the "R" and "D" ranges are higher than
specified:
• Line pressure too low
• Improper fluid levelStall speed 2450
150rpm

AUTOMATIC TRANSMISSION (AW30-40LE) 7A–65
F07RY00004
HYDRAULIC TEST
PREPARATION
1) Warm up the transmission fluid.
2) Remove the transmission case test plug and mount the
hydraulic pressure gauge.
Oil pressure gauge: 5-8840-0093-0
NOTE:
Perform the test at normal operating fluid temperature (50
– 80
C or 122 – 176F).
MEASURE LINE PRESSURE
1) Fully apply the parking brake and chock the four wheels.
2) Start the engine and check idling rpm.
3) Shift into "D" range, step down strongly on the brake pedal
with your left foot and, while manipulating the accelerator
pedal with the right foot, measure the line pressures at the
engine speeds specified in the table.
4) In the same manner, perform the test in "R" range.
EVALUATION
1) If the measured values at all ranges are higher than
specified.
• Pressure control solenoid defective.
• Primary regulator valve defective.
2) If the measured values at all ranges are lower than
specified.
• Primary regulator valve defective.
• Oil pump defective.
• Pressure control solenoid defective.
3) If pressure is low in "D" range only:
• "D" range circuit fluid leakage.
4) If pressure is low in "R" range only:
• "R" range circuit fluid leakage. Engine
speedLine pressure kPa (kg/cm
2/psi)
"D" range "R" range
Idling 358 – 417
(3.6–4.3 / 51–61)588 – 686
(6.0–7.0 / 85–100)
Stall 1,176 – 1,323
(12.0–13.5 / 171–192)1,607 – 1,940
(16.4–19.8 / 233–282)