Hi I have a 85 300D and I had to take the boot off at the axle end for a unrelated reason and noticed this boot was full of oil. Is it supposed to be that way? Seems weird to me but I am rarely surprised when working on this thing as stuff is different. If they are supposed to have oil in them how would you get that out when changing? If I drain the diff there would still be a bunch of crappy oil in there would there not? I would have thought there would be a seal at the end of the diff housing where the axle went in to it. If the boot cracked then all your oil would run out and that would be bad.