Rear drivetrain noise

[tylka]

If the CVs are bad, where is a good company to purchase new one from for the tiptronic gearbox?

[Boxtaboy]

I had that problem except that it only happened on right turns under power. Turned out it was a worn out motor mount that caused enough driveline disturbance that the grinding showed up in those conditions. New motor mount fixed the problem. This happened to my car at around 60k miles. My car's a manual though.