Stall Speed Test

WARNING: APPLY THE SERVICE AND PARKING BRAKES FIRMLY WHILE PERFORMING EACH STALL TEST.

CAUTION: Perform the line pressure test prior to performing the stall test. If line pressure is low at stall, do not perform the stall test or further transmission damage will occur.

NOTE: The stall test should only be performed with the engine and transmission at normal operating temperatures.

The stall test checks the operation of the following items:
- torque converter one-way clutch
- forward clutch
- low one-way clutch
- reverse clutch
- overdrive one-way clutch
- direct clutch
- engine performance

1. Connect a tachometer to the engine.
2. After testing each of the following ranges, OD, 2, 1 and R. move the transmission range selector lever to N (NEUTRAL) and run the engine for about 15 seconds to allow the torque converter to cool before testing the next range.
3. Press the accelerator pedal to floor (WOT) in each range. Record the rpm reached in each range. Stall speeds should be 2256 to 2712 rpm.

CAUTION:
- If the engine rpm recorded by the tachometer exceeds the maximum specified rpm, release the accelerator pedal immediately. Clutch or band slippage is indicated.
- Do not maintain Wide-Open Throttle (WOT) in any gear range for more than 5 seconds.





If the stall speeds were too high, refer to the Stall Speed Diagnosis Chart. If the stall speeds were too low, check engine tune-up. If the engine is OK, remove the torque converter and check the torque converter reactor one-way clutch for slippage.