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Torque Converter Operation Test

WARNING: This page is about a different car, the 2005 Ford RV Cutaway, 2005 Ford Econoline, 2005 Ford E450 Super Duty, and 2005 Ford Cutaway. However, it is still accessible from the selected car via links, so may be relevant.

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

  1. Carry out Quick Test, refer to ON-BOARD DIAGNOSTICS WITH DIAGNOSTIC TOOL . Check for DTCs. Refer to the DIAGNOSTIC TROUBLE CODE CHART .
  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 a constant vehicle speed of about 80 km/h (50 mph) and tap brake pedal with the left foot.
  5. Engine rpm should increase when brake pedal is tapped and decrease about 5 seconds after pedal is released. If this does not occur, refer to Torque Converter Operation Test .
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