How screwed is my 6L80

[Houston Ben]

Been having bad vibrations that I keep thinking I fix but it always comes back. By pinion and trans angle had been messed up so I fixed that but still had problems. Shook the u-joints and found play in the rear on the axle so I removed the drive shaft to replace u-join. Just for fun I tried to move the trans output shaft and it moved eaisly

So can someone please tell me how screwed my trans is and what it will take/cost to fix????

https://www.youtube.com/watch?v=fSzM...ature=youtu.be