The 350z tranny will not match up with the SR20. One's and inline 4 and the other is a V6. I am not sure if there is any tiptronic nissan's that fit onto the SR20. Even if there is, they are only average. My friend owns a G35 with the Tiptronic, needless to say it sucked... The engine doesnt let you rev it too much. To little control, and the shifts weren't smooth at all. Ive drive a 2004 Tiptronic TL, much better.
--2004 Acura TL Dynamic--