I changed the shaft of a Dura-Ace 7600 hub.
After putting it back together, it made some noise when rolling and was noticeably less smooth.
It's an open bearing hub, so it's possible some dirt got inside.
I opened it up again and cleaned out the hub and re-greased completely. It was still not much better. I then exchanged all balls and greased again with dura-ace grease.
The noise is gone now, but compared to my front wheel it doesn't run quite as smooth anymore. When holding it in your hands and turning the wheel you can feel a tiny unevenness somewhere.
It's possible that the hub itself has some pits from the dirt that got in? I couldn't see any with my bare eyes however.
I am trying to find out if using the wheel like this will make the problem worse.
Any advice would be greatly appreciated.