No, stock 3.73 and it's quite sluggish. The previous owner put 32s on it so it was slow before but it's definitely slow now. I can hold 65-75 without much struggle but getting there is painful. I've only put 500 or so miles on the jeep since then so I can't really comment about fuel economy. Oh I should add its a 3.8L auto. I'm running steel wheels, sliders, and some tools in the back so I'm not a TON heavier than stock. More armor and a winch is planned and I assume that'll bog her down a bit more as well.Thanks a lot for taking the time to reply with such detail. Did you re-gear when you got bigger tires?