Basically a repost but different people look at different threads so I wanted to throw it out there.
We have been using Redline for some time at the shop and the fluids we use for the following applications are....
We use the normal 75W90 for the differential. You can find it on our site
HERE.
We have recently begun using Redline's MT-85 for transmission fluid. Redline specifically lists this fluid for use in the 370Z. You can see it on their site
HERE. I really appreciate a customer and forum member for pointing this fluid out to us. The MT-85 fluid can be found on our site
HERE.
Finally you can find the metal washers for the drain plugs on our site
HERE.
This is what we have found works well in the majority of 370Z applications.