2016 auto. Going for a cruise - everythings normal. After 30-40 mi. I get this noise that you first notice as you come to a stop. It sounds like it could be something in the tire, but it's not. You slow down, it slows down, you speed up it speeds up. But you can only hear it it very slow speed. The longer you drive it, you can hear it at normal speed. No vibration or anything else strange, just noise. Any suggestions?