Yesterday I took my aftermarket wheels and tires (31" Good Year MTR's ) and put my stock wheels back on. Now I have a thumping when I go slow. It does it when the brakes are applied and when they are not. It does it in gear or just coasting.Its not the tire cause it does it about twice for every rotation of the tire. It kinda sounds like someone is tapping on the underside of the car with a wrench or something. (only description I could think of) It kinda sounds like it is coming from the front maybe the right side. I am not very mechanicaly inclined so please help.... Thanks, Joe