My car is comletely stock. (that is a sad depressing story in of itself ) When I am coasting (i.e. not pressing the accelerator) i notice that there is a resonating sound at around 30 mph. If I accelerate and let off the gas and coast down to 30 it will do it again. What could that be. It is weird. The car feels fine other wise. At first i thought it might be a certain road, but I was able to reproduce it everywhere I went. It is only around 30mph and then it dissappears above or below. Any ideas? Thanks.



oh, and it's not related to steering / steering wheel etc. I mean that the steering wheel does not shake at all. It is dead on.

 

I had something like that, but it was only when I had the sun roof open, I don't think you're doing that yet?