Had a slight Ticking start yesterday after I was down shifting to slow down to go over rough RR tracks, heard a loud pop, 20 min later when decelerating in gear started to hear a tick, tick, tick, push clutch in goes away, hit brakes or accelerate it goes away.
Got with the top driveline tech this morning he confirmed sound, 45 min later I was told by the Tech that there was a bearing locating pin broke I believe( old and bad memory) and they said they will order the part and should have it Monday, said was safe to drive , bearing in place but don't be crazy!