I PURCHASED A NEW 2008 SPECIAL 60TH EDITION FORD F-150 ON 4MAY08. I NOTICED WHEN THE VEHICLE WAS ABOVE SPEEDS OF 55MPH IT STARTED TO VIBRATE IN THE FRONTEND. I RETURNED TO THE DEALERSHIP TO HAVE THEM FIX THE PROBLEM, BUT THEY SAID THE VEHICLE WAS SOUND AND HAD NO PROBLEMS. I WHEN TO EDMONDS.COM AND FOUND OUT THAT THERE WAS A PROBLEM WITH THE SPECIAL 60TH EDITION FORD F150 WITH THE DRIVELINE, WHICH MAY MAKE THE VEHICLE VIBRATE AT SPEEDS OF 55 -60MPH. WHAT CAN I DO IF THE DEALERSHIP WANT FIX THE TRUCK? *TR