A huge variety of Ring & Pinion sets are available for you to re-gear your 2008-2010 Ford 6.4L Powerstroke. Offered in ratios from 3.31 to 5.38, these gear sets are available in a wide range to fit your needs. There are numerous options available for front and rear differentials on your vehicle. Dorman, USA Standard, Yukon, and Nitro are just some of the industry leading brands you can find for gear and axle components.