Converter Stall Test

Stall testing involves determining maximum engine speed obtainable at full throttle with the rear wheels locked and the transmission in D range. This test checks the holding ability of the converter overrunning and transmission clutches.

WARNING: NEVER ALLOW ANYONE TO STAND DIRECTLY IN LINE WITH THE VEHICLE FRONT OR REAR DURING A STALL TEST. ALWAYS BLOCK THE WHEELS AND FULLY APPLY THE SERVICE A14D PARKING BRAKES DURING THE TEST.

STALL TEST PROCEDURE
1. Connect tachometer to engine. Position tachometer so it can be viewed from driver's seat.
2. Drive vehicle to bring transmission fluid up to normal operating temperature. Vehicle can be driven on road or on chassis dynamometer, if available.
3. Check transmission fluid level. Add fluid if necessary.
4. Block front wheels.
5. Fully apply service and parking brakes.
6. Open throttle completely and record maximum engine speed registered on tachometer. It takes 4-10 seconds to reach max. rpm. Once max. rpm has been achieved, do not hold wide open throttle for more than 4-5 seconds.

CAUTION: Stalling the converter causes a rapid increase in fluid temperature. To avoid fluid overheating, hold the engine at maximum rpm for no more than 5 seconds. If engine exceeds 2500 rpm during the test, release the accelerator pedal immediately; transmission clutch slippage is occurring.

7. If a second stall test is required, cool down fluid before proceeding. Shift into NEUTRAL and run engine at 1000 rpm for 20-30 seconds to cool fluid.