Ford 3500 Tractor Rearend Ring & Pinion Gear Set C5NN4668D Posted onDecember 29, 2025AuthoradminCategoriesfordTagsc5nn4668d, ford, gear, pinion, rearend, ring, tractor Up for sale is a rearend ring and pinion gear set. It came off a Ford 3500 t ractor. The gears look good, but the ring gear bearing needs to be replaced. The ring gear has 43 teeth and the pinion has 6 teeth. What you see is what you get.