Drinking coffee this morning screwing around, found this...http://www.leftlanenews.com/ford-f-250-super-duty-2011.html

Truck belongs to my cousin...has 124k miles on it...Ran fine till the other day. Was going down the road then all of a sudden it lost power and starting knocking pretty bad is what he described. Was able to very slowly limp it home. I went over there today and looked at it...Oil looks good...