Yesterday I'm cruising on the highway about 65 and change lanes. It felt and sounded like I was going over rumble strips, then it stopped. This morning on an exit ramp it felt like I was on a washboard road surface. This is now slightly noticeable when going straight. I can make this happen at speeds above 40 by quickly steering side to side. Doing a slow speed circle can't feel a thing. What do you think, a wheel bearing failing? My dealer can't look at it till Wednesday.