I knew it was too good to be true, i replaced the tranny on my M5, still getting this noise, i think i am just going to give up, there is no-one here that can fix this car, italians know nothing about bmw's especially m cars. I already have a few thousand into it since i bought it, i dont know what else to do, it sits at the mechanics more than i can drive it. Anyone else have any advice or words of encouragement, otherwise i may have to sell it or junk it, I hate to do it, but I have no idea what the noise is, its seems to be getting worse, an no-one knows how to fix it.