nitrowizard88

Since I have gotten good helpful replies from this forum I will try again. I have a 2000 explorer sport. My problem is: I sounds like I have a flat spot or a knot on my right front. So I moved it to the back to see if that was it. Well for awhile it sounded like it was but now the noise has come back to the right front. The noise speeds up when accelerating and slow down while breaking. Its not a humming,screeching, squeeling noise. Itsa more like a thump thump thump noise. Any Ideas? Thanks for your time and help