Why does my truck sound like a helicopter?
I have a 2004 F150 super cab and since owning it have had very few problems and never any major mechanical issues with it. It's paid off and still running strong. The only thing I can't figure out about it, even after 5 years, is why when I roll the back windows down at highway speed I get an eardrum pounding "whump, whump" sound that seems to pulsate through the cab. The pressure is hard enough to hurt your ears and distort your vision, and it literally sounds like a chinook helicopter is landing on top of the thing. The only way to alleviate it is to rolll down all of the windows, which I don't like to do. I assume it's something to do with the aerodynamics of the vehicle, but I'm just curious if anyone else has ever experienced this or found a way to reduce or elliminate it?