No it wont upshift, but it will downshift. Thankgod!

I've owned both an AT & MT 370Z.
It really depends on what you want to do. The MT has
you more involved in driving the car, and there is a lot
internal satisfaction and daily enjoyment derived from that.

When driving the AT in (M)anual mode you physically
feel a layer of abstraction (or separation) from the
car when driving. That said, I have seen a report that the AT has
put down faster 0-60 & 1/4 mile times due to the
*quicker* shifts (see article here). From experience, I will
definitely say you will want to drive the AT in M mode all the time
(for performance reasons). Also, know that the paddle
shifters with the AT are quite nice and can be used at any time
(in Drive mode or M mode); you lose this option when having a MT.

so weird!!! I went to dealership to get fix this issue. When the service maneger test drive with me, that grinding noise were gone!!! We did several time.
And that noise back!! while I was driving back to my home!!:shakes head:WTF!!

:rofl2:

Not another war between AT and Manual ..... can we all get along and agree that it is a great car??? With that said. I was driving my girl the other night and I remember someone memtioning having her hand on the stick (car) and his over it to shift... I tried it Great Idea man!!!:iagree: :bowrofl:

Have you since got the problem diagnosed and repaired. Please post so we can find out what went wrong. Thanks.

whether the transmission is in drive or manual mode....it still shifts gears...i doubt leaving it in maunual mode all the time has any negitive effects on the tranny.