I came across this again today. I am thinking I may do it on my 95 soon. the clunk when shifting is getting annoying. I spent today and a couple hours yesterday swapping differentials from one 83' 240d to another 83' 240d. dropping the differential on the w123 only takes 1.5-2 hours and about the same to install wondering how much harder it would be to do this, though. It looks almost like it'd be in there as tight as a balljoint.. what a PITA..