[Goose]

I've had a similar noise with my car, both at low speeds and while in relatively no load situations (e.g. constant speed, flat road).

I have been told that Superformance has increased clearances in the differential and this is contributing to this noise. I am not sure what acceptable play is at the wheel, but would like to know so that I can determine if I have a "normal" amount of play or too much.

I have also been told that poor ignition can induce the situation that I sometimes experience in the low-load circumstances through a mild "bucking" of the drive train.