Ive searched but havent found the problem im having..so here goes...as i was dragging today, as i was making my next pass 4th gear starting acting funny and made the bike vibrate very hard. So as i ride it around all the other gears are just fine, just fourth gear sounds pretty bad and feels very bad... like something is tearing up...has anyone had this issue or know what this could sound like...and could i just replace 4th gear instead of a new tranny. I really dont wanna have to split the cases, what could cause this...thanks in advance...again it only acts up in 4th