only when driving forward? Okay.. so I have a 2002 BMW M3 with 30,000 miles on it. My rear right tire, or in the vicinity of that... I hear a loud grinding noise when driving FORWARD. It seems rotational too... i.e. a sound of... grind..grind...SCREETCH..grind..grind... like it happens at a certain point of rotation. I looked physically at the tire and rotor and nothing seems out of place. When the car is in reverse, the car and that area are perfectly quiet. It is most noticeable in 1st and 2nd gear between 2k and 3.5K rpms where after that its a high pitch noise that is steady, but at lower rpms its a rotational sound. That's the best I can describe it. Please help.
NOTE: The brake pads are not worn, I just did a pad/rotor replacement 2K miles ago.
And it happens when no pressure is applied to the brakes. Just accelerating will do it.