my audi 90 quattro has two probs which r really startin to **** me off - the first is my abs seems to pump all the time when bracking at slow speed ( practically comming to a stop). the abs light isnt on, however when i now try to switch on the diff lock the green light dosent come on and the abs light dosent come on. it always used to and according to the manual this is normal. secondly i have a duff wheel bearing like sound comming from underneath, i no its summat to do with the prop but i dont no exactly what part of the drivetrain it could be. i would really apprieciate any help anyone could give as ive spent alot restoring it and the noise from the prop is really starting to get me down. cheers peeps