NHTSA Complaint #10464587 — 2001 FORD ESCAPE

IT WAS HAPPENED ABOUT A YEAR AGO, ESPECIALLY UNDER THE HOT WEATHER CONDITION. I AM NOT SURE THAT WHERE THE MASSIVE VIBRATION SOUND COMES FROM BUT MOST LIKELY IT FEELS THROUGH THE STEERING WHEEL(STEERING SHAFT ROD?) OR BRAKE PEDAL. WHEN I FIRST REALIZED THIS PROBLEM, IT WAS VERY HOT SUMMER DAY AND AIR CONDITIONER (AC) WAS ON. I DROVE ABOUT FOR 15-20 MINUTES AND PARKED THE VEHICLE FOR A WHILE (ABOUT 20 MINUTES OR SO). THEN I STARTED THE ENGINE AGAIN AND TRIED TO BACK UP THE VEHICLE FROM THE PARKING SPOT, IT WAS HAPPENED. AFTER THAT HAPPENING, I WAS HAVING SAME PROBLEM WHENEVER I WAS DRIVING WITH AC ON(I DID NOT HAVE THE PROBLEM DURING COLD SEASON AT ALL). NOW IS SUMMER OF 2012 AND THIS PROBLEM HAS BEEN COMING BACK MOST OF TIME OF DRIVING NO MATTER AC IS ON OR OFF (IT SEEMS LIKE GETTING WORST?). PAST 10 YEARS, I HAD SEVERAL RECALLS WITH THIS VEHICLE SO I REALLY WANT TO REPORT THE PROBLEM I HAVE IN CASE. *TR