75W85 GL-4 is the correct fluid for the transmission. For Redline, this is MT85 fluid. FYI, people are currently reporting good results with a Mitsubishi fluid: http://www.gencoupe.com/engine/117454-manual-transmission-development-thread-36.html#post1493175What kind of transmission fluid should I go with in my 2013 3.8 6MT, MT85 or MT90? And also would lightweight shockproof be a good idea for the 3.73 Torsen LSD?
For the rear diff you want 75W90 GL-5 Gear Oil, and if you're looking at Redline fluids, they call it exactly that: "75W90 GL-5 Gear Oil".