After installing larger tires, a lift kit and adding several heavy accessories to my Jeep Gladiator, I began to notice a reduction in performance. I elected to swap out the ring and pinon gears to see if I could get some of that performance back. In the process I wanted to do a test to see how it would affect my gas mileage. We tried to be as fair as possible in our pre and post gas mileage test, but because this is real world, there are several factors that can affect the results.