My 62 has been running great, no signs of problems. Today, when I started the truck, it immediately made a loud screeching sound (from the engine compartment. I shut it down and took a look under the hood. I can't see what the problem is, but there is a strong burned rubber smell. :-[ Based on the sound and the smell, it seems like it might be a belt being pulled across a pulley that is not turning as it should. Can anyone give me a hint as to what the problem might be? Many thanks.