Information?? High quality chassis partseries products. Made with high strength steel tubing for superior strength and durability. Stable performance, reliable quality and long service life Uniform thickness, no blow holes, slag, cracks, tearing, or incomplete fusion. Measured by specialized inspection tools after welding to make sure assemble hole , bushings insert, and installation sizes are proper. Professional InstallerisHighly Recommended(No Instruction Included) Alignment Highly Recommended After InstallCompatibility Chart: For Dodge Nitro 2007-2011 V63.7L Front w/DanaModel30Axle,3.21GearRatio For Dodge Nitro 2010-2011 V64.0L Front w/DanaModel30Axle,3.21GearRatio For Jeep Liberty 2008-2010 V63.7L Front w/DanaModel30Axle,3.21GearRatio For Jeep Wrangler 2012-2018 V63.6L Front w/DanaModel30Axle,3.21GearRatio For Jeep Wrangler 2007-2011 V63.8L Front w/DanaModel30Axle,3.21GearRatioPackage Content?? 1x Front Differential Case