I have a Kubota BX1860V that the 3 point hitch just dropped down hard all by itself ,engine running not on tractor at the time. The Dealer said they removed a rear cover plate on rear of transmission and oil was spraying inside when they tried to lift hitch. They are not sure what is problem,Kubota said no oil should be in this area and they did not know. They want several thousand to disassemble and see what is wrong.Any help would be Great.