GM 4L60E 1997-2003 Master Rebuild Kit This transmission rebuild kit includes the High Energy Alto Friction Plates, Steel Plates, Sealing Rings, Metal Clad Seals, Gaskets, O-rings & Rubber Piston Seals. This Transmission Kit is one we sell everyday to Transmission Shops, it fits 1997-2003 GM 4L60E transmissions. All these Kits have Sealing rings made by SPX/Filtran or Stellar, High Energy Clutches Manufactured by Alto and Gasket Sets made by the Co. TRANSTEC.