A lot of cars do that. It's some sort of buffeting from the wind passing by the open rear windows. Some cars, I suppose depending on the shape, do it more than others. Just roll them up.It feels like the car is gonna fall apart. I was drivin 65ish with all my windows down, and my girl called. I rolled up the front windows and it **** near shook the car apart. Why does it do that????
Yup, My dad had 1975 528 Beemer that did exactly that - Scared the **** out of me when it happened (that would make it 35+ years ;-)That goes back for at least 20+ yr with all the cars I see everyday..
Earth Science 101 :banana: