Fresh 904....just stopped shifting.

I will guess input shaft sheared. But a thorough investigation will be in order to find this problem. any noises with the engine running and in park or neutral?

No noise...not even a little whine or click. Rear end still works and the Park pawl still locks the tranny (an aside but I figure I would report that anyway). I will remove the dust cover and see if the TC bolts sheered after work today.
Please keep those suggestions coming...and thank you.