First off I'm new to the forums so hello and thanks in advance. I have a 02 foreman 450 with 29.5 outlaws (and other mods). Saturday is was loading my bike on my trailer and halfway up the ramp I heard a loud snap and it just rolled back down. It shifts with no problem but it feels like it just won't catch a gear. If I engage 4x4 the front wheels turn but not the back. So far I have torn apart the diff and everything looks fine, so I put it back together and last night I pulled open the crank case but to be honest I'm no mechanic and I'm not sure what to look for. I'm really hoping I'm not going to have to open up more of the motor, any advise you guys might have or ideas on what to look for would be greatly appreciated.