i have a stock jk with 3.21 gears in it i want to put a 2.5" lift on it an run a 33"-35" tire would the stock gears be ok for runing thos tires? also i do alot of off roadin on weekends on muddy an some pretty steep trails an hill climbs and some rocky hills too. would it be wise just to jump to a 3.73 gear for this set up... Thanks

 

3.21 will be fine, I'm running 37's and stock gears and havent had any problems, sure it's slow and terrible gas miles, but I live 1/2 mile from work and only way I'm traveling is when I go to wheel, but stock will carry the 33-35 you want to run. if you do decide to pull them out, IMO go to 4.10 or 4.88. 3.73 would be a waste of time. You may also want to consider lockers if you change the gears