When I rev my car up past about 4500 rpm's, Or when I go to pass someone on the road and I really get on the gas I get a high pitched squeal coming from...............somewhere. Me and a friend tried to figure out where it was coming from today. And we couldn't find it. I thought maybe it's a loose belt or something. But it doesn't seem to be coming from under the hood. I can't figure it out. I don't know if this is normal.....but I haven't heard it before. Amyone know what this could be?