I did replace the drivers side blown out motor mount which didn't solve the vibration. The vibration is under acceleration and gets worse the harder you accelerate. If you take it easy and get put to speed there is no vibration or at least much less.

I just wiggled my 93 240 manual's DS and it has a similar clicking noise but no vibrations and the movement is similar. So my feeling now is it may not be the support bushing. There are not squeaks or squeals so the bearing must be ok. I guess I could remove the DS and check ujoints.

One thing I read was feel the E brake handle to see if the vibration is present in the handle which it is and that may mean the center support bushing is suspect.

Another thing might be a worn tail shaft bushing but that is something I have not experienced.
Thanks Kit

Dan