Well, I finally changed the rear diff mounts in my car. It was labor intensive (but, I loved every painful minute of it). However, if you do not have the special tool needed, forget it!!!Pay somebody to do it. While I was "down there", I also noticed the need for new exhaust hangers, which were done at the same time.
I do not know if it is my idea but, the new diff mounts are a marked improvement in the road feel of the car. I am happy with the results but, let me give you this warning, this job is NOT for everybody.