MY 2000 FORD EXPEDITION WILL NOT STAY IN PARK. AND WHEN IT IS IN PARK AFTER A COUPLE MINUTES IT WILL JUST GO BACKWARDS. MY FORD HAS ALREADY HIT A PARKED VEHICLE. I WAS WARMING HER UP. I GOT OUT TO SHUT MY BACK HATCH IT JUST TOOK OFF BACKWARDS WHILE STILL IN PARK AND HIT ANOTHER VEHICLE. I TRIED JUMPING IN THE MY TRUCK PUT WAS DRAGGED AND UNABLE TO STOP IT. I DON'T FEEL SAFE BUT HAVE NO CHOICE BUT TO DEAL WITH THIS ISSUE. MANY MECHANICS LOOKED AT IT SAID THEY DON'T KNOW WHAT'S CAUSING THE PROBLEM. *TR