There's a ton of whine because of the backlash specs in the diff. It's on every 370z...

Hmmm, didn't notice it. I think people whine too much about normal things.

BTW, what are the backlash specs?

I had one F-body with 13 thou and it didn't make a peep, and one with about 7 thou, and it did. Both chalked out to show a great wear pattern.

Rear ends are finicky creatures, which is why I NEVER plan on doing gears in any car I buy unless I buy a pre-set up chunk or something.

There are plenty of AUTO vs. MT gearbox threads. Please search for them. We don't like discussing AUTO vs MT transmission here on the forum.

YES, the airbags automatically deactivates.

Good luck with your purchase.