Yukon Trac Lok positraction internals for Dana 80 and with 35 spline axles. Uses round design cross pin. (Not for Dana 60 or 70). Yukon uses higher quality materials and better techniques than OEM to ensure a longer lasting spider gear set. All components come with a one year warranty against manufacturing defects. Dana 80 Trac Lok spider gears, 35spline (" round" design cross pin, NOT Dana 60 or NOT Dana 70 ).