This high energy TH350 master less steel rebuild kit with ALTO friction clutches is a complete transmission rebuild kit. This rebuild kit includes all of the friction plates, sealing rings, metal clad seals, gaskets, o-rings, rubber piston seals, band, filter, modulator, pump bushing, and extension house bushing.. These clutches are put through a process where the friction paper is saturated in a phenolic resin, cured, and then saturated a second time in a silicate. The silicate imparts high heat resistance.