I have an old mid to late 80's Suzuki 230 quad Shaft, i had it out last weekend and everything was fine, i put it in neutral waiting for someone and once i tried puting it in gear it would not engage you can hear something turning in the shaft or rear end but it won't go anywhere foward or reverse. I put it on a stand and even in neutral turning the tires you can here something, havent taken it apart yet but does someone have any idea what it could be?