Kit contains all of the bearings, seals, o-rings, and shims as required to rebuild the transmission. Direct OEM replacement at a fraction of the cost. High quality ABEC 3 precision ball bearings used throughout. Ball Bearings, needle bearings, tapered bearings, PTFE lined bearings, seals and o-rings, all sourced from high quality trusted manufactures from around the world. Kits containing tapered bearings include shim selection.