I'm new here and still trying to figure it out so i'll cut to the chase. I have a 2002 wrangler sport on 33 13.50 toyo mt's I have the 3:73 gears in it and am trying to find out if I should go with the 4:27;s or the 4:56 gears. I really want to improve gase milage cause i'm getting about 10 or 11 miles to the gallon. It also is slugish going up hills on the highway. I do go off road cuase its a jeep and thats what its made for but I want a good middle of the road "factoy" style gearing for what I have on it. Also Is it worth it to install myslef?is it hard? or should I just take it to the shop that qouted me around 1200$ for gears installed? Please help..