High performance Yukon Ring & Pinion gear set for Toyota FJ Cruiser Front, 4.88 ratio, thick. Yukon Ring & Pinion sets give you the confidence of knowing you?re running gears designed for the harshest of conditions. Whether it?s on the street, off-road, or at the track; Yukon ring & pinion sets deliver unrivaled performance & quality. This is a thick gear for a 3.73 & down carrier. Yukon uses the latest designs and manufacturing technologies to provide a quiet running gear that is strong and easy to set up. All Yukon ring & pinion sets come standard with a one-year warranty.