I just put a 3600 in my G8. Great mod. Youll have to change shift scheduling for sure. I also changed lock up configuration and added a little pressure. Go get the BlueCat Trans software. Download it, input the values you want, then copy paste to your tune.
I have stock gears, stock size tire, shifting @6500 and lockup 4th, 5th and 6th. If that?s what you got, it will work ok. If not, you should use Bluecat app.