RARE PARTS INC. is now manufacturing DIAMOND SERIES rear UPPER ball joints for GM trucks and SUVs equipped with Quadrasteer. These ball joints have been declared obsolete by GM, and haven’t been available anywhere – until now.
Our DIAMOND SERIES ball joints feature improved heavy duty housings, and trade the OE style nylon internals for powdered metal bearings, and belville preload washers for longer service life. Ball studs are case hardened. Pregreased with AMSOIL synthetic lubricant, and made in the USA.