RossS3

Hi guys. New to the forum but have had VW/Audi for a few years now and have just bought a 2014 S3. Never had a 4wd/quattro before. Got it for reasonable money as there is a noise in the rear which I am pretty sure is the rear diff. Doesn’t seem to be a wheel bearing as noise doesn’t change with change of direction and it seems to get a bit louder when I let off throttle/coast. Again never diagnosed anything with a 4wd system so from reading forums that seems to equate to possibly rear diff. Question is will a rear diff from a same year A3 1.8 FSI Quattro fit? Part numbers are the same and letter at the end is. I intend to drain a little bit of diff oil and see if any metal in it. Any help would be greatly appreciated. Thanks in advance and looking forward to sharing any experiences or knowledge I have along the way.