Rugged Ridge 15001.39 30 Spline Internal Mount Manual Locking Hub Fits GM 1 ton pickup 76-91*; Dodge 3/4 ton pickup 90-93, 1 ton pickup 90-93; Ford F250 3/4 ton 78-97, F350 1 ton 76-97, Ford F250 / 350 Super Duty 99-04. *All Chevrolet pickups 1988 equipped with automatic hub system cannot be converted A full metal cap and body crafted from impact resistant nodular iron Corrosion resistant die cast aluminum caps coated with high luster epoxy enamel for along lasting finish More durable and cost effective than replacing or servicing automatic hubs Easy to install average installation is completed in less than 20 minutes