I was told by the mechanic that he had seen this before.It seemed to be running fine then it made a lot of noise.I was about 2 miles from home and returned and parked it and had it towed there.I was told it was inside the hub and they had to dismantle the whole ass end to fix it...Again thanks Ford.....If you have a ( better idea) sure wish you would have shared it with me before I bought the piece of crap....this hasn't been the first issue with this SUV...will never buy Ford again.........