I had this same issue initially. There's not much room to work with when trying to tighten the bottom nut since the LCA gets in the way. I found that removing the top nut fully, and rolling the anti-roll bar forward or backwards helps to give alot more clearance to be able to torque it properly. I ended up using blue loctite too. Once both driver and passenger bottom nuts were torqued, I rolled it back in place and did the tops, which are way easier.
Its been a couple thousand miles and I haven't had any issues with it since. Hope this helps.
Its been a couple thousand miles and I haven't had any issues with it since. Hope this helps.