..I'll get this back on topic! I haven't seen any updates, anything new?
I would like to add that your drive shaft u-joint could be bad.. did you look over it? A bad u-joint will cause these issues.. I have the same issue, but haven't replaced anything yet. I think I may just replace the entire drive shaft right away to avoid false diagnosis. My guibo looks good, I'll drop the exhaust and look at the u-joint and CSB. I'll keep updated, but I would recommend testing your u-joints by lifting your car, putting it in neutral and trying to twist your drive shaft. If it has ANY play in the u-joint, that is supposed to indicate failure.
Sent from my DROID RAZR MAXX
RL Ultimo coils, Bilstein top hats, Rob43 rear adjustable shocks, Meyle RSM's, Status Gruppe front links, Meyle CA's, AKG 95a CAB's, Powerflex 95a RTAB's, M3 engine mounts, UUC 5sp Mounts, BMW Performance SSK, Jaffster knob, headers, CAI, lots of weight reduction.