Vibrating/shaking from box (yr 2005)
I have a 2005 F150 and I was wondering if anyone else has problems with their box vibrating/shaking, where you can see the back of the box shake while you drive and that you can feel it. It starts shaking at 55 to 60 miles per hour. I put new shocks, new front struts, new tires and rims and they balanced twice. I still don't know what is wrong with it and if it is just common among F150s.