My son's Mk1 Leon 1.8T was making a noise at 40+. I went with him on a drive just before the MOT was due and I diagnosed front ns wheel bearing gone. Sure enough, rocking the wheel top and bottom gave the game away. The MOT tester agreed and after replacing bearing all was well. Errr... except there is still a noise! Now I can't tell what this is. It sounds worse when going straight or turning right. Turning left seems to be quieter. Is this likely to be a diff problem or maybe the other front wheel bearing? Car has done about 80k miles.