Install a truetrac along with moser axles a couple of days ago and this thing is smoooth. I thought for sure I would have some kind of noise as it seams everything adds noise. But to my surprise no noise except for I believe I heard a pop once when going from forward to reverse. If that's it ill take it. Do these things loosen up and make noise? Am I safe or should I get ready for goofy noises in the future? I'm running 85-140 conventional gear oil. In any event so far (250miles) the only difference is the truetrac makes less noise that the factory moaner.