Just got back from a ride noticed cassette had a wobble (still got a couple of pb's lol) took cassette off and it's the freehub that's wobbling. Good service or needs a new one? Campag Zonda shimano freehub
Depends what's gone wrong. It's probably a bearing collapsed, but it depends on whether anything else has been damaged by the bearing failing.
Only way to find out is to strip it.
Exploded diagram can be found in the Campag parts catalogue - https://www.campagnolo.com/media/files/035_2374_Catalogue_spare%20parts_...