Up for sale is a 4.11 ring and pinion removed from a first gen Sterling 10.25 full floating axle these came in 1985-1992 F250 and F350 trucks . Ring and pinion gears are in good condition, normal ware . Pinion bearings are in good usable condition no pitting or gouges . Crush sleave and pinion nut should be replaced, old nut can be used to get new crush sleave close to preload before installing new nut. These would also fit 93-97 second gen 10.25 but would need to use the first gen 3.25 yoke and woud work in a 99-04 10.5 if you use the bearings that come with it or new 10.25 pinion bearings and the first gen 3.25 yoke . Won't work 10.5 pinion bearings or yoke .