I have been all over this forum, and there are only a hand full of people that actually understand what the hell is going on with this. Tach is dead on, the internal threads of the sleeve are incorrect, which allows the rod ends to pull out of the sleeve. the nuts are NOT loosing up causing the problem, but just one of the signs of the problem, the other is your steering wheel going off center slowly or in extreme circumstance quickly, which loss of steering is soon to come.
I haven't done the "TEMP" fix yet and do not plan to. instead I will be buying a new sleeve from MOOG ($130), I feel this will fix the problem and I will still have thew fine tuning of the draglink as FCA intended. with the Synenergy draglink everyone else is raving about you will loose that fine tuning ability.