V6 S550 Cooling - Trans and Oil

[CobaltFilly]

I have read up on this much, but want some ideas.
Question #1, I am going to upgrade my radiator to a CSF Racing Radiator, and use water/water wetter for coolant during summer months, maybe winter if Central Valley California isn't too cold for that, thoughts?
Question #2, out on my last two track days my 6r80 trans hit 252* on the third session, making me nervous to push it further. I am going to install my new RaceLouvers this or next month and see how that helps but sheesh 252* is hot!!! Can you please help me figure out the cooling solution! @flyhalf suggested I DIY a Setrab. Can you all help me with a comprehensive parts list? I am a little lost as this will be my biggest DIY yet. I intend to use either a 6-series 650 or 644, if you all suggest these are good choices.
Question #3, should I avoid an oil cooler for now, or do it at the same time?

Thanks for the help!!!
-Cobalt Filly's Young Noob Racer

 

[JDee]

Put your RaceLouvers in asap and try again. Don't do anything else until you do that. I found that made a huge difference in cooling in my '16 PP1 car. It's probably the cheapest cooling upgrade you can do, increases airflow through the coolers hugely.
Having an auto trans is a big cooling problem. Manuals are easier to deal with, though the Getrag boxes can be almost as much trouble for cooling as an auto. Any trans on a track car needs to have active cooling on it. Same for diffs.

 

[CobaltFilly]

Put your RaceLouvers in asap and try again. Don't do anything else until you do that. I found that made a huge difference in cooling in my '16 PP1 car. It's probably the cheapest cooling upgrade you can do, increases airflow through the coolers hugely.
Having an auto trans is a big cooling problem. Manuals are easier to deal with, though the Getrag boxes can be almost as much trouble for cooling as an auto. Any trans on a track car needs to have active cooling on it. Same for diffs.

Roger!!! Will report back here if nothing changes once done.