17 JKU Sahara, should I do gears?

I just bought a Sahara and it has 35s and the auto. My plan was to upgrade to 4.88 gears, but then I started reading and understanding I have a Dana 30 for the front axle. Is it worth spending the money to regear or should I just get a whole new front axle setup first? I do go offroad some, but its mostly mild stuff. Hayfields and dirt rutty mountain paths occasionally. No heavy duty rock crawling or bouncing around the front end.