Hey guys,
So I just got myself a 400 EX, and it seems to have some issues. When I shift, first and second work fine, but when I get to third it won’t go into gear. It will either grind in and out, or pop me into neutral. It sounds horrible. It will, however, go past third and into forth and fifth with no issue.
I was hoping that someone would give some insight on what is happening here. Also, if someone could give me directions to some instructions for taking the tranny apart, that would be helpful.

Thanks!