I bought my Jeep off a guy who bought off a guy who put on the lift kit and tires. The guy I got it from knew about as little as anyone I've met (and I'm no mechanic so thats sayin something). So he couldn't really tell me much I couldn't see for myself. I was wondering if there was a way to tell if the gearing had been changed ? I'm running 33's and when I'm doing 60mph im at 2100rmp if that helps.