Hey guys i am trying to repair/ trouble shoot an issue with 04 rancher 400 AT. 4x4. I get a sounds like slipping roar when placed in any gear of either setting and increases with throttle .Sometimes at first response of throttle it trys to jump forward and again as it revs back almost to the idle. Sometimes it will even " catch" and the thing will actually operate somewhat normal shifting through the gears at increasing speeds. It almost feels like stripped splinds or a slipping cluch. Has anyone had this exact issue and if so help please. Great running bike. Oil change light is also on.