I have a unique noise from my truck that sounds like fluttering rather loud at almost all speeds even when the engine is off in neutral coasting.
Had the front end done checked U joints and DIff…all good. 19,000 miles. Sounds and feels like you have to open a window to relieve air pressure but that doesn’t not help. Tranny was checked too.
I’ve been on many BB sites noone can figure it out but its annoying. I have a big box truck with a translucent roof that ocilates a little bit but I’m not sold that it is the roof yet. I almost bought a wind deflector thinking that could be the problem…(wind) but not sure yet because I hear it at even 3MPH its crazy
I’ll take any thoughts