The E36 diff carrier to frame mount looked a little odd. Seems to be a gap between the frame mount and E36 carrier rubber bushing. And it is the same on the three that I viewed. Attached link is a picture of what I'm seeing (can not figure out how to post a picture). Put the jack under the differential, put some weight on the jack, no movement around the mount area. seems OK?
http://s1139.photobucket.com/user/do...258_0.jpg.html