I have a KitchenAid K5SS that has to be at least 20 years old. It has very low "mileage," however. Tonight while making bread dough it started to make pitiful noises and locked up. It seems to spin just fine without resistance (ie, empty bowl) but otherwise jams and makes an awful gyung-gyung-gyung noise. Is that it's death rattle? I'm hoping it's just pining for the fiords.