Opel Frontera UBS. Manual - part 2550

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 – 176

°

F).

(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) Start 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 level

Stall speed

2450 

±

 150rpm

7A–64

AUTOMATIC TRANSMISSION (AW30-40LE)

F07RY00003

TIME LAG TEST

If the shift lever is shifted while the engine is idling, there will be
a certain time elapse or lag before the shock can be felt. This is
used for checking the condition of the forward clutch, direct
clutch, No. 3 brake, and No. 2 one-way clutch.

NOTE: 

(1) Perform the test at normal operation fluid temperature

(50 – 80

°°°°

C or 122 – 176

°°°°

F).

(2) Be sure to allow one minute interval between tests.

(3) Make three measurements and take the average value.

MEASURE TIME LAG

1) Fully apply the parking brake.

2) Start the engine.

Check idling speed (A/C OFF)

3) Shift the shift lever from "N" to "D" range. Using a stop

watch, measure the time it takes from shifting the lever until
the shock is felt.

4) In same manner, measure the time lag for "N" 

→

 "R".

EVALUATION

1) If "N" 

→

 "D" time lag is longer than specified:

• Line pressure too low

• Forward clutch malfunction

• No. 2 one-way clutch not operating properly

2) If "N" 

→

 "R" time lag is longer than specified:

• Line pressure too low

• Direct clutch malfunction

• No. 3 brake malfunction

3) If both time lag is longer than specified:

• Line pressure too low

"N" range

695 – 745 rpm

 Time lag 

Less than 0.7 seconds

Time lag

Less than 1.2 seconds

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 – 176

°

F).

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 

speed

Line 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)

7A–66

AUTOMATIC TRANSMISSION (AW30-40LE)

255RT004

F07RY00005

F07RY00006

ROAD TEST

NOTE: 

Perform the test at normal operation fluid temperature (50

– 80

°

C or 122 – 176

°

F).

"D" RANGE TEST IN "NORMAL", AND "POWER"
PATTERN RANGES

Shift into the "D" range and hold the accelerator pedal constant
at the 50% and 100% throttle valve opening positions.
Push in one of the pattern selector buttons and check the
following:

1) 1-2, 2-3, 3-OD and lock-up, up-shifts should take place,

and shift points should conform to those shown in the
automatic shift diagram.

NOTE:  
Drive the vehicle on level ground so as not to change to up
and down hill control.

EVALUATION

(1) If there is no 1 

→

 2 up-shift:

• No. 2 solenoid is stuck

• 1-2 shift valve is stuck

(2) If there is no 2 

→

 3 up-shift:

• No. 1 solenoid is stuck

• 2-3 shift valve is stuck

(3) If there is no 3 

→

 OD up-shift (throttle valve opening 1/2):

• No. 2 solenoid is stuck

• 3-4 shift valve is stuck

(4) If the shift point is defective:

Refer to

 "TROUBLESHOOTING CHART" in this section. 

(5) If the lock-up is defective:

Refer to

 "TROUBLESHOOTING CHART" in this section. 

2) In the same manner, check the shock and slip at the 1 

→

 2,

2 

→

 3 and 3 

→

 OD up-shifts.

EVALUATION

If the shock is excessive:
Refer to

 "TROUBLESHOOTING CHART" in this section.