I have a 2014 FJ and for the last year or so, when I reach 50mph up to about 70 I hear a noise that sounds like a screachy rattle coming from the outside below the airvents at the base of the windshield. To me it sounds like a speedometer cable going bad, but I don't know if this vehicle even has a speedo cable. I don't think so. The other strange thing is that it isn't always there. It shows up for a while and then goes away. Any thoughts?