Yukon positraction internals for 7.5" and 7.625" GM with 28 spline axles. Yukon uses higher quality materials and better techniques than OEM to ensure a longer lasting spider gear set. This kit does not include clutches. All components come with a one year warranty against manufacturing defects. This kit fits Yukon Dura Grip & Eaton positraction cases. It is not compatible with any other positractions.