Hmmm. Went to shop to swap Tranny (just as a precaution) Lo & Behold the tailshaft mount is different on the one we where pulling out vrs the 2 spares we had to put in. The one in car has a Y bracket that bolts directly to the tailshaft, So I pull my trusty parts manual and diagram shows a different set with 2 rubber mounts on a wider Y bracket that appears to bolt to the bottom of tailshaft. Appears that the bottom mount to frame is the same. Of course I can't seem to find the different Y bracket in our parts stash(ok pile of stuff) also the extra Frame mount bushing is shot the one in car looks to be a rubber mount for a Aframe for better durabilty. Any helpful hints tips etc appreciated
The 2nd Gen trannys are interchangeable between S4 and S5, however you need the corresponding mount. The 86-88 S4 tranny mount is different than the 89-91 S5 tranny mount.
Here's a picture of the two different mounts on some parts trannys.