I was wondering if anyone else noticed the massive vibration through the gearbox? If I'm at or above 3K rpms the shifter feels like the electrocution game at Disneyland. I also feel some vibration in the clutch at this point as well. My friend who owned a 300z TT said that was normal as it did the same in his car and every Nissan he's owned. It's kind of strange.

 

It does vibrate a bit typically, but if it's as bad as you say, that's probably not normal. Would be a good idea to get it checked out.