High performance Ring & Pinion gear set for Dana Spicer 36 ICA in a 3.73 ratio. Thin, for 3.07 and up cases, exclusively uses 8620 steel in all their Ring & Pinion sets for high strength and long life. They use the latest designs and manufacturing technologies to provide a quiet running gear that is strong and easy to set up. All Ring & Pinion sets come standard with a one-year warranty.