TeraFlex 3442002 Ball Joints (Premium JK Dana 30/44 Ball Joint Kit) All 4 Ball Joints Fits 07-12 JK ONLY 4140 Chrome Moly Graspable 2013 and newer require axle shaft modification (Grinding) All 4 Ball Joints Fits 07-12 JK ONLY 4140 Chrome Moly Greasable! 2013 and newer require axle shaft modification (Grinding).