I have the D35 in mine. Was talking with Essentially Off Road (who builds some of the most bad ass Jeeps and Bouncers around) about doing a V8 conversion for me. I asked about my axels and they said unless I was going over 33's and planned on doing some pretty hardcore wheeling, doing a little upgrading on my existing axles would be fine. No need for a 44.
2013 Wrangler Sport S. Max tow, 3.73, connection package, power package, upgraded Alpine, Rough County stubby bumper mod, Rugged Ridge light bar, Ace rock sliders, Rough Country 2.5" lift, 15" MB TKO's, 33" Duratrac's, Spiderweb Shade.