Stall Test

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 operating temperature and its level is between FULL and LOW marks.

CAUTION:
^ Do not run engine at stall more than 5 seconds continuously, 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 become constant (stall speed).
6. Release accelerator pedal immediately after stall speed is checked.
7. In the same way, check stall speed in "R" range.
8. Stall speed should be within following specification.

Stall speed: 2,150-2,400 r/min

CHECK RESULT/POSSIBLE CAUSE
Lower than standard level:
- Faulty engine output
- Defective torque converter

Higher than standard level in "D" range:
- Slippery O/D clutch
- Slippery forward clutch
- Malfunctioning O/D one-way clutch
- Malfunctioning one-way clutch No. 2
- Low line pressure

Higher than standard level in "R" range:
- Slippery direct clutch
- Slippery reverse brake
- Low fluid pressure
- Slippery O/D clutch
- Defective O/D one-way clutch