Chevy 4 Speed SM465 Transmission Rebuild Kit 1988-On BK129L This SM465 has an iron case with an aluminum top cover! This transmission uses the TM211 or 211FFLE input bearing that is .083" (21mm) thick. This is thicker than the early SM465 input bearings. It is important that you measure your input bearing to make sure you are getting the correct kit. Do not rely on the year of your vehicle as there are exceptions! This Transmission usually comes in the 88-91 GM 1/2, 3/4 Ton or 1 Ton TRUCKS, Stepvans and Full Size Vans. This kit includes all New Bearings, Seals, Gaskets, and Complete Small Parts Kit (washers, needles, snap rings).