Stall Speed Test
Stall Speed TestWARNING: Apply the service and parking brakes firmly while carrying out each stall test.
NOTE: The stall test should only be carried out with the engine and transmission at normal operating temperatures.
The stall test checks the operation of these items:
^ Torque converter one-way clutch
^ Forward clutch
^ Reverse clutch
^ Direct clutch
^ Engine driveability concerns
1. Connect a tachometer to the engine.
2. After testing each of these ranges, D, 3, 2, 1 and REVERSE, move the transmission range selector lever to NEUTRAL and run the engine for about 15 seconds to allow the torque converter to cool before testing the next range.
3. CAUTION: If the engine rpm recorded by the tachometer exceeds the maximum specified rpm, release the accelerator pedal immediately. Clutch slippage is indicated.
CAUTION: Do not maintain wide-open throttle (WOT) in any gear range for more than 5 seconds or damage to the transmission may occur.
Press the accelerator pedal to the floor (WOT) in each range. Record the rpm reached in each range. Stall speeds should be in the appropriate range.
Stall Speed:
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.