Stall Speed Test

Special Testing Procedures

Stall Speed Test

NOTICE: Carry out the Line Pressure Test prior to the Stall Speed Test. If line pressure is low, do not carry out the stall test or additional transmission damage will occur. Do not maintain Wide Open Throttle (WOT) in any gear range for more than 5 seconds.

NOTE: After testing each of the ranges, move the selector lever into the NEUTRAL position and run the engine at 1,000 rpm for about 15 seconds to allow the torque converter to cool off before continuing onto the next range.

NOTE: If the engine speed exceeds maximum specified rpm, release the accelerator pedal immediately.

NOTE: Only perform the stall speed test with the engine and transmission at normal operating temperatures.

The Stall Speed Test checks the operation of the following items:

- Torque converter reactor One-Way Clutch (OWC)
- Forward clutch
- Low OWC
- Overdrive OWC
- Engine driveability concerns

1. Connect a scan tool.

2. Press the accelerator pedal to WOT in each range. Record the rpm reached in each range. Stall speeds should be in the appropriate range.

Stall Speed





Stall Speed Diagnosis Chart