I have an early "posi" that doesnt work. I will not be absolutely certain it is an equa-lock until I get it apart, but if I find five tabs on the clutches, then the question will be answered. So, here is what I want to know and cant seem to find an answer to: How can I tell if the Belleville spring is bad, or....do they actually wear out? If it is broken, that will be obvious.....but otherwise, is there a way to know if it is still good? That spring seems to be gone from the face of the earth. I could just buy a trac loc, but have read at least 4 testimonies of equa lock systems working just fine, and at least one person making a good case for the less grip limited slip being a good thing in a light car. I would rather have a good mannered diff than a flawless strip warrior....but if Equa lock should be abandoned, I will listen. So....1) what about that spring? 2) should I scrap it and go trac loc?