[Alpinerunner]

I believe I have the same problem and it is worn front CV axles. The boot on the outter CV axles on my 330xi have completely split on both sides. This leaked the grease out/let dirt in and now I get a high-frequency vibration at those speeds. What did you find out? I would also like to know, if this is the problem, can I just replace the boot and grease, or will the CV be damaged. What tools are required for this? Do I have to pull the wheel bearing? Thanks!