Alright, i am scheduling an appointment at the dealership.

I just wanted to share this with you and see if anyone else is having the same issue, and to share the outcome & results.

When in first gear, if i am not heavy on the gas, there is this horrific metal-like vibration that seems to come from the Trans.
It is only happening when i take off slowly. You know, when living in So.California, you cannot just get in your car and drive. You sit a lot in traffic, and a lot of stop-and-go. So if i am just inching my way through traffic, little by little, i hear this damn noise.
I noticed that if i apply alot of gas, then i dont hear it. I have played with my clutch swing, to see if the tone changes, and it does seem to be related.
Will keep you in the loop! Wish me luck with Nissan!

Hey man... I have the same thing. Also in SoCal! Did you get a resolution to this???