I have an 85 with an np208 case. I heard a ticking recently, and got under it and rotated the driveshaft. There is a tick inside the case, one tick for every revolution of the driveshaft. Aside from that it runs fine. It's just loud enough to really pester you while you are driving. The fluid is level with the fill hole on the top and it's fresh ATF, I put it in about a month ago. I initially thought it may be the universals but I greased those, stuck a screwdriver/mechanical stethoscope to the case and that's where it's coming from. Any suggestions are greatly appreciated. "who dares wins"