I have a 2016 F-150 3.5 4x4. When I bought the truck it had a slight squeaking, barely noticeable. Now it is more frequent especially since it is getting colder. It is like a squeak/rattle that speeds up as wheels speed up. I have taken it to multiple dealerships and I have been told, by one, it was a loose spare tire. The rest cannot duplicate it. I need help I'm about to lose my mind.