Hiya i was i wonder if theres anyone On here that knows abit about the mk2 172 gearbox or more importantly the diff!! Iv recently started to get a high pitch whistle almost which im more than certain is the diff bearings. I havent looked properly yet but seem to remember there being what looked like a diff cover on the box and its made me wonder if you can get the diff out and replace the bearings leaveing the gearbox in place!? Can anybody help?