Bought a cub 7525 tractor hydrostat with 27hp Mitsubishi 3cyl. Question is when I push in clutch disengage PTO and let it out pro starts clicking in our put of Transmission lightly in 540 but loud when set to 2000 any information is welcome PTO shaft turns when engaged stops with clutch engaged.. sounds like the splines are slipping in the transmission but not sure if it's out of adjustment somewhere have no idea