This kit replaces the internals of a positraction unit for popular Ford diffs with 28 spline axles. Yukon uses higher quality materials and better techniques than OEM to ensure longer lasting gears. This kit does not include clutches.Additional Attributes:GTIN:00883584160229Grade Type:RegularCalifornia Proposition 65:NoExtended Information:Emissions :1Life Cycle Status:Available To OrderPackaging:Quantity of Each:1.0Package UOM:EADimension:12.0000 x 12.0000 x 3.0000 inchesWeight:4.2000 PG