2005-2010 Jeep Grand Cherokee and Commander axle swap. We here at CB Engineering can swap your Jeep WK or XH axles for either 3.07 or 3.73 gears. We swap the axles and reprogram the computer to recognize for new axle ratio. We can supply the axles for an extra cost or you can supply the axles. We also sell and install 4.10 Nitro Gears as well. Contact us for axle availability and other questions.