I have a buddy who had a 2013 f350 srw and ford ended up giving him all his money back includung the money he had spent on the bed liner and hitch, It had a real bad shake when towing a 5th wheel he had. All the wheights where under the rateing of the truck,ford even had it weighed by their guys and they could not find the problem after replacing everthing from motor mounts to rearend,my buddy went and bought a chevy,lol!