Toyota Tacoma/Tundra R151 2001-04 Transmission Rebuild Kit RWD or 4WD 5spd Manual Transmission BK163FWS This rebuild kit is for the 5 speed R151 transmission which has an aluminum case and removable bell housing. This transmission uses 92mm outside diameter input bearing. This Transmission was used in the following applications: This kit comes with all the main bearings, input pocket bearing, seals, gaskets, and Synchro Rings.