RTS Performance Rebuilding kits provide all the soft parts required to rebuild a specific type of transmission, Using Alto internals who are the industry leader in content and quality. Our various rebuilding kits cover a wide range of content. Gasket and Seal Kits (Paper and Rubber) Contains all paper gaskets, rubber O-rings, pan gasket, rubber lip seals. Master Kits Contains steel clutch plates. Super Kits Contains Master Kit plus filter, bands, modulator, common bushings and washers.