tach, after 2 completely problem-free assembly weeks I noticed that starting from 180km/h the HA starts with buzzing. it doesn’t vibrate, but it buzzes quite rough, similar to a very deep, rolling thunderstorm, and it gets louder up to 200, then quieter again, and then it starts to become louder again from 220. wheels are fixed, wheel bearings have no noteworthy game, the DIFF. sounds different when playing. wheel bearings would also buzz my knowledge rather than buzz. it’s a kind of buzzing what could that be the middle bearing rubbers? the buzzing is only since this week, where I drive a little more “quiet” again. I can’t exactly locate it, assuming that it is created broadly just before the tank. (backseat seat) aja, car is Omega B Caravan, 220000km down. since I don’t have an internet this week again, don’t be angry if I don’t answer. write your ideas, I’ll follow them up and then report on the WE again. mfg, patrick…. PS: I have noc times a new theme opened up because I think it has nothing to do with my DIFF. but the noise already bothers me… gruss, patrick.