Stall Speed Test

Special Testing Procedures

Stall Speed Test

NOTICE: Carry out the Line Pressure Test prior to carrying out the Stall Speed Test. If line pressure is low at stall, 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 recorded by the tachometer exceeds maximum specified rpm, release the throttle immediately. Clutch or band slippage is indicated.

NOTE: The Stall Speed Test should only be carried out with the engine and transmission at normal operating temperatures.

NOTE: Prolonged use of this procedure may set DTCs P0712 or P1783. After carrying out the Stall Speed Test, run On-Board Diagnostic (OBD) test and clear the DTCs.

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

- Torque Converter Clutch (TCC)
- Forward clutch
- Low One-Way Clutch (OWC)
- Overdrive (O/D) 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 Chart





Stall Speed Diagnosis Chart