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Torque Converter Operation Test

WARNING: This page is about a different car, the 2004 Mercury Monterey and 2004 Ford Freestar. However, it is still accessible from the selected car via links, so may be relevant.

This test verifies that the TCC control system and the torque converter are operating correctly.

  1. Carry out Quick Test. Refer to the tester manual. Check for DTCs.
  2. Connect a tachometer to the engine.
  3. Bring the engine to normal operating temperature by driving the vehicle at highway speeds for approximately 15 minutes in D position.
  4. After normal operating temperature is reached, maintain constant vehicle speed of about 80 km/h (50 mph) and tap the brake pedal with the left foot.
  5. Engine rpm should increase when brake pedal is tapped, and decrease about five seconds after pedal is released. If this does not occur see torque converter operation concerns. Refer to DIAGNOSIS BY SYMPTOM .
  6. If the vehicle stalls in D or manual 3 at idle with vehicle at a stop, move the selector lever to manual 1 position. If the vehicle stalls see torque converter operation concerns. Refer to DIAGNOSIS BY SYMPTOM . Repair as required. If the vehicle does not stall in D, refer to DIAGNOSIS BY SYMPTOM .
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