Prop coupling fail and diff leak.

Hi guys had the prop coupling fail today on the rear of my 300, nursed it home steady from the pnp but now I have the pinion leaking oil. I've removed prop and coupling and have zero play in bearing in any direction and no noise just a little backlash in pinion to sun gear which I expect for 160k diff. Weird though is it doesn't look like it leaked while driving it home as didn't blow back under diff but has put a few drips on my drive since I first looked two hours earlier when I first got home and it was dry then. Do we think I just need new donut and a seal replacement due to the vibration I was getting, or am I looking at diff strip and new bearings aswell? Cheers guys sorry for the story but I like to give as much info as possible.

If there is no play it should be fine

if theres no play at all in bearings ,just fit a new seal

That's what I was hoping everyone would say. Cheers. Also noticed the bush in the end of prop has been damaged. Is this available with the new donut. I know 200 prop conversion is ideal but I'm on a budget at the moment as just brought a house and mot due next month. Mmm fun