I've got a 2014 2dr. Wrangler w/ the Willys wheeler Package. That means it has 3.73 gears. It was ordered w/ the auto trans as well.
I've run it up from where I live at 1900 ft. to anywhere between 6500 and 8500 ft. along with some low range off roading. Overall mileage has run between the high 17's to the high 18's by the time I refill the gas tank where I live. E