Time to introduce my self I think. I'm Denis from the Rep. of Ireland and bought my 1st Audi last November and I have to say I'm impressed. Logged on here soon after and I have to say many of my questions were answered before I even had to ask, so Thanks:thumbsup: The car is a 01 A4 B6 1.8T quattro saloon in silver, one previous lady owner (I know, sounds like a dodgy ad!), with 130k on the clock at time of purchase. In pretty good condition, needs the odd scratch and stone chip sorting out, the usual really. Now for my question, has anyone had to replace the seal on the rear diff? Had it on a lift the other day and a nice bit of gear oil showing. wiped it down, checked the drain/filler plug and it seemed fine. Any suspects, tips etc would be greatly appreciated.