I just got mine in December and don't have a lot of miles on it. When going down the road, above 20mph, I start to get a very high pitched whining sound. Almost sound like a small jet engine. By the time I get to 35mph, the sounds just gets to where you can't stand it. No smoke or any sign or smell of anything. It is not the tires or the emergency brake. Anyone have an idea what it is? Thanks in advance.