Driving through Montana this week we began hearing a grinding noise when going over bumps. It quickly progressed to a constant grinding. Pulled over and found this heavy gauge 6 foot piece of steel dragging on the road. It appears to be a heat shield that was spot welded about every 10 inches to the right side of the frame (2015 F 53, 18,000 GVWR). About half of the welds were broken allowing one end (fortunately the back end!) to drag. I was able to crawl under and break the remaining welds and so remove the entire piece. I think it will be OK without it. It might be a Ford part as it is powder coated the same as the frame. Has anyone else heard of this part falling off or of being of any particular use in the first place?