Its a G35 base coupe. The noise only happens during rotation. Sounds as if something is broken because it typically happens what seems like every other rotation. Like is something round like a bearing is snapped, which could rotate fine ever so often but shifts and grids against its self

 

The noise was a busted hub assembly. I replaced it tonight, and the noise was GONE. I noticed after pulling everything off that the hub was very wobbly - had a LOT of play.