Stall Speed Test

Warning: Apply the parking brake firmly while carrying out each stall test.

Caution: Carry out the Line Pressure Test prior to Carrying out the Stall Speed Test. If the line pressure is low at stall, do not carry out the Stall Test or further transaxle damage will occur.

The stall speed test checks:
- torque converter clutch operation and installation.
- Forward clutch.
- Low one-way clutch.
- reverse clutch.
- Low intermediate band.
- engine performance.

Carry out this test with the engine coolant and transmission fluid at correct levels and at normal operating temperature.
Apply the parking brake firmly for each stall speed test.





1. Find the specified stall rpm for the vehicle. Refer to the Stall Speed Chart. Use a grease pencil to mark the rpm on the dial of a tachometer.
2. Connect a tachometer to the engine.

3. Note: If the rpm recorded by the tachometer exceeds the maximum limits, release the accelerator pedal immediately because clutch or band slippage is indicated.

Note: After each range, move the selector lever to NEUTRAL and run the engine at 1000 rpm for about 15 seconds to cool the torque converter before carrying out the next test.

In each of the following ranges (D), 2, 1, R, press the accelerator pedal to the floor and hold it just long enough to let the engine get to Wide Open Throttle (WOT). While carrying out this test, do not hold the throttle open for more than 5 seconds at a time.

4. Note the results in each range.
5. Refer to the following chart for corrective actions.

6. Note: The stall speed in REVERSE will be lower.

Stall Speed Diagnosis Chart:

If stall speeds were too high, refer to the chart. If stall speeds were too low, first check engine idle speed and tune-up. If engine is OK, remove torque converter and check torque converter clutch for slippage.