Torqshift - Automatic Transaxle/Transmission
Stall Speed TestWARNING: Block all wheels, set the parking brake and firmly apply the service brake to reduce the risk of vehicle movement during this procedure. Failure to follow these instructions may result in serious personal injury.
CAUTION: 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. Line Pressure Test
CAUTION: After testing each of the ranges, move the range selector 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.
CAUTION: If the engine speed recorded by the scan tool exceeds maximum specified rpm, release the throttle immediately. Clutch or band slippage is indicated.
NOTE: The stall 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 diagnostics and clear the DTCs.
The stall test checks the operation of the following items:
^ Torque converter clutch (TCC)
^ Forward clutch
^ Low one-way clutch (OWC)
^ Overdrive OWC
^ Engine driveability concerns
1. Connect a scan tool.
2. Press the accelerator pedal to floor (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
