From what I have read, It will allow you to change tire size and a few other things like TPMS. I suggest you contact Superchips directly and they can tell you exactly what it will do.
2008 Black and Khaki Sahara Unlimited. Auto, Tow pkg, Dual Tops, MyGig, Trax-Lok rear diff. 3.5" Rock Krawler fr springs, rear TeraFlex 2.5 BB, 35x12.50x17 Pitbull Rockers on Blackrock Viper Alloys, Flex-o-lite trans cooler, Mr Grille billet grille inserts, AEV Prem Bumper ETC.. AND a Locked and Lifted Honda Foreman for when the trails get real tight