Engineered by Sun Coast and manufactured by Alto, this kit offers the shop owner or DIY the components to rebuild and upgrade the 4R100 Transmission. This kit furnishes all the gaskets, seals, sealing rings, Alto Red Eagle frictions, Kolene steels, pressure plates and snap rings for severe service or high power applications. Increases clutch count in forward, direct, intermediate, coast*, and overdrive clutch packs.

*Only if you purchase the upgrades coast clutch drum.