Revolution gear Dana 35 5.13 ratio gear sets are made from top quality 8620 steel and are precision heat treated to OEM specifications, making for the best aftermarket gears available. Revolution gear engineered the 5.13 to have the same size and same pinion tooth count as the 4.88 ratio giving the 5.13 equal strength to the 4.88 gear. The 5.13 are perfect for 35"+ tall tires on 02 & newer TJ & LJ models with AOD trans, and will let it stay in OD at highway speeds. Like All revolution ring and pinion sets they are backed by an industry leading 2 year warranty against defects. Revolution gears are also double, and in some cases triple lapped for flawless setup, smother running and longer life. With products that have been street, off road and race proven for more than a decade, you can count on Revolution Gear & Axle products to be the best aftermarket parts available.