Dana 44 35 Spline 3.73 Down Ected Max Selectable Locker For Use With Aftermarket 35 Spline Axles;For Use With 3.73 and Down Gears; Able To Shift From Limited Slip To Spool On The Fly; No Additional Parts Needed;Smooth Street Operation;4 Year Replacement Warranty JEEP WRANGLER (JK) ISLANDER MOUNTAIN SAHARA SPORT UNLIMITED ISLANDER UNLIMITED MOUNTAIN UNLIMITED SAHARA UNLIMITED SPORT UNLIMITED X X 2007 2008 2009 2010 2011 2012 3.6L ERB (220) Pentastar 3.8L (3778cc) GAS Auburn Gear Auburn Gear Dana 44 35 Spline 3.73 Down Ected Max Selectable Locker - 545021 545021 Differentials