Originally Posted by InvertChaos
I would go with regearing as superchips have little effect on jeeps besides changing shift points for the auto.
As far as what company to go with, many people go with Yukon or I have USA Standard in mine.
As far as ratio goes, go as deep as you can with the auto, and I think 5.13 for the 6 speed, but I am not sure if a non D44 front can go that low.
There are also other things to consider when running 37s like brakes, steering, and axle strength, but that is out of the scope of my knowledge.
Edit: also you can figure out your current ratio by jacking up a tire, and spinning it two revolutions while counting drive shaft revolutions.
Skip the tuner. With your setup, it's not gonna do you much good.
For gearing I believe the cut-off is 5.38's. Since you've got an '09, that's where I'd go. 5.13's would help you but aren't ideal for that tire size. Since you're gonna spend the $$, go with 5.38.
At the least, for 37's you want a new steering stabilizer, and a sleeve/gusset job for your front axle. With tires that size, you will bend or break your axle, otherwise, especially if you wheel it (which I'm assuming you do.)