This is a 4.88 ring & Pinion set for the 14 bolt cover, 12 bolt ring gear, 9.5" diameter ring gear rear differential used by General Motors in Pickups and Vans from 1981 to present day production. Known to many as the "Semi Float" 14 bolt, this is a vary durable rear used in 3/4 ton vehicles and some very heavy GVW 1/2 ton vehicles. Top quality ring & Pinion set from Motive Gear in Chicago IL. Questions? Call Customer Service TOLL FREE 1-877-614-4327 |