Mine is a 2014. Pretty sure it is up front. I have had the tie rods/trackbar/drag link on and off several times due to some upgrades up there. Just haven't upgraded them yet...lol. I thought i read it does have sway control. I look at it as an opportunity to upgrade... .Sway control comes with the tow package on the JK but I believe I read somewhere that 2013-on it comes standard regardless of whether or not you have the tow package.
Sounds like you do have something going on in your front end. Always a pain tracking that stuff down, BTDT!! Good luck!