SEMA Guy
Member
I have a pronounced whistle from the passenger side mirror at 65-80 mph. Wasn’t there when new. Only passenger side - never driver’s side. Goes away by folding the mirrors. Ford tried to avoid replacing the mirror but eventually did replace it. New mirror also whistles. I taped off all the gaps (door, fender, and mirror). Whistle still there. Dealer installed a new mirror off a 2019 sitting on their lot and the noise was gone. They took the mirror cover off to color match it to my truck. Whistle is back. Anyone else dealing with a whistle?
