Stall Speed Test

The object of this test is to check the overall performance of the transmission and engine by measuring the maximum engine speeds in the D and R ranges.

CAUTION:
- Perform the test at normal operating fluid temperature (50 - 80°C or 122 - 176°F).
- Do not continuously run this test longer than 5 seconds.

MEASURE STALL SPEED



a. Chock the front and rear wheels.
b. Connect a tachometer to the engine.
c. Fully apply the parking brake.
d. Step down strongly on the brake pedal with your left foot.
e. Start the engine.
f. Shift into the D range. Step all the way down on the accelerator pedal with your right foot.
Quickly read the highest engine rpm at this time.

Stall speed: 2,100 ± 150 rpm

g. Perform the same test in R range.

EVALUATION
a. If the engine speed is the same for both ranges but lower than specified value:
- Engine output may be 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.

b. If the stall speed at D range is higher than specified:
- Line pressure too low
- Forward clutch slipping
- No.2 one-way clutch not operating properly
- OD one-way clutch not operating properly

c. If the stall speed at R range is higher than specified:
- Line pressure too low
- Direct clutch slipping
- First and reverse brake slipping
- OD one-way clutch not operating properly

d. If the stall speed in R and D ranges is higher than specified:
- Line pressure too low
- Improper fluid level
- OD one-way clutch not operating properly