GM Turbo Hydromatic 400 High Energy Rebuild Kit This Kit has High Energy (Green) Alto Frictions. This rebuild kit includes all of the Friction Clutches, Steel Plates, Sealing Rings, Metal Clad Seals, Gaskets, Orings & Rubber Pistion Seals. This Transmission Kit is one we sell everyday to Transmission Shops, it fits the THM400 1965-UP All these Kits have Sealing rings made by SPX/Filtran or Stellar, High Energy (Green) Friction Clutches Manufactured by Alto and Gasket Sets made by the Co. TRANSTEC