Hey Tea Cup, I just got my long block replaced for a broken rod at 5000 miles. I'm now at 6500. Also, there is a humming sound, on and off constantly at 60 mph and when I make a sharp right turn, there is a knocking sound, similar to the rod problem, but from the left side of the suspensions. I took it to the dealer and they said that it's the lsd that is making the noise when I make that right turn. As for the humming sound, they don't know. I'll look for the VIN and date and pm you.