Genuine Ford Ring & Pinion gear set 3.73 ratio for the 9.75" differential in the 2011 + Ford F-150. Part number CL3Z-4209-D2011 + Ford 9.75" 3.73 Ring & Pinion Gear set CL3Z-4209-DSKU: CL3Z-4209-D-TN82124 $301.54 Regular Price$150.77Sale PriceQuantityAdd to Cart