Now this is my first tonneau cover and my buddy here has one on his truck. I love the look of it but I noticed that when I get to 60 MPH or so it starts to vibrate the vinyl really bad and I can hear the annoying sound in the cab. Now is this common cause my buddy's cover is the same one except on a Dodge Ram and his does not do this. Could this be cause by the mounting rails being set too high and air getting under the cover and causing more vibrations? Or should I loosen the cover even more than I already have? It is at the recommended tension from the manufacturer. Hopefully someone knows how to fix this problem.