I can't quote any Ford sources, but I looked around the internet, and many people are saying the traction lok lsd is weak. I asked a Ford tech what he thinks, but I haven't got an answer yet. like I said, I had my differential fluids changed at 48 K, I'm just below 53K in my '15 ecoboost, I'm doing my best to maintain the stang, and so far its been a good car, and the lsd seems to be doing it's job, but I just am worried about premature failure in those limited slips. I've heard different things.