This TeraFlex JK front full float conversion kit was designed as an upgrade to the JK Dana 30 and 44 axles. The full float conversion will deliver a number of major benefits over the factory unit bearing design. TeraFlex was able to dramatically reduce the bearing load by increasing distances between outer and inner wheel bearings inside the hub. These bearings rest on forged 4140 chromoly spindles which accept readily available low cost industry standard seals and bearings. The incorporation of an 8 on 6.5" wheel bolt pattern assisted in the use of one-ton Dana 60 application components throughout the system. This unique TeraFlex hub design allows for OE wheel speed sensors to be protected and seald from rock, mud, and other damaging materials, ensuring a clear, constant data transmission, maintaining every ESP and ABS functions. This SlimLock hub kit comes with forged 4340 chromoly 35 spline stub shafts. This specific hub design incorporates a high surface area engagement with an extreme durability. The kit works perfectly for flat towing by allowing hubs to be set in an unlocked position during transportation. The full float conversion becomes available with either the dual piston big brake kit or the TeraFlex performance rotor kit. The 2007-2012 Dana 30 axles will require new inner shafts with a larger u-joing end forgings (#303118 for driver side and 303134 for passenger side). All 2013+ Dana 30 & Dana 44 JK axles use the same U-joint. The Full Float kit may not work with all wheels. Please verify fitment before installation.