I have a 2001 trail boss. It seems to run good until I am stuck or very hard initial acceleration. When the trans is loaded hard it sounds like to gears are grinding. I have not yet taken the trans out and opened it up. Any thoughts? I am assuming the forward gear inside the case is worn and jumps under hard load or the shift spindle (not sure exactly what it is called) is worn and slips allowing the gear and spindle to slip.