Recent content by Big Bill

I recently bought my first Jeep. (2006 Rubicon Unlimited) The jeep already had some upgrades including 33/12.5/15 tires and 4.88 gears. I put 35/12.5/15 tires on and now noticing the transmission shifting hard. I bought a Superchip Flashpaq F5 to adjust the tire size and gears in the computer...