GM 700R4 4L60 Late 1987-93 Rebuild Kit This transmission rebuild kit includes Alto Friction Plates, 3-4 Power Pack, Steel Plates, Sealing Rings, Metal Clad Seals, Gaskets, Orings & Rubber Piston Seals. This pack comes with the Alto Power Pack for the 3-4 clutch. This Power Pack has additional clutches to increase friction plate capacity. This allows for an increased torque load with reduced heat generated. This Transmission Kit is one we sell everyday to Transmission Shops, it fits 1987-92 GM 700R4 / 4L60 transmission. All these Kits have Sealing rings made by SPX/Filtran or Stellar, Clutches Manufactured by Alto and Gasket Sets made by the Co. TRANSTEC.