Hi, my car starts droning from around 20 miles an hour! I have had the left front wheel bearing changed, all drive belts are fairly new. There is no noise at idle or 2-3000 revs whilst not moving. I have noticed that when I drive around a left hand bend it disappears then returns when on straight, also gets louder around right hand bend! I have had all wheels of the ground and checked for play but all seem ok! Totally baffled and doing my head in!