I actually found 2 issues when i took off the sprocket. It was extemely loose and I could move the nut with my hand. The other issue was that the edges of the toothed colar (I think that is what it is called) were a little worn on the edges. I guessthat was from the sprocket being loose. I am beginning to beleive that the posts about Steve's Moed are correct. They are the ones that put this sprocket on for the kid I bought it from. Itshould not have come looose.
The seal was very easy to replace.