2001 Expedition 5.4L. Trucks runs great. It doesnt matter if its warm or cold, it has a problem stalling out when put in reverse. I have cleaned the idle air control, then I put a new idle air control on it. Could this be the fuel filter? Torque Converter? Another question, possible relevant...when we drive the truck around town it doesn't leak, but recently we drove about 3 hours away and it dumped quite a bit of tranny fluid????