My 71 has slowly been going downhill. When driving, if you pull up to a redlight or just stop, the car shakes crazy like. I can hear what sounds like a high pitched grinding noise. I have plenty of ideas but looking for an answer.
I assume it's an auto? So, when your driving normally you don't have the noise and it runs ok? Only when you come to a stop - hmmm I'd say you have a sizable vac leak somewhere, not sure what the noise could be - conveter/flexplate or maybe just something loose - does it sound like tin or something thick/heavy rubbing, or is it more from vibration..?
The noise is pretty much noticeable slowing down and coming to a stop. Sounds like high pitched grind almost. Almost hear it in the rear of the car, but even when your stopped in gear you hear it. Im guessing its trans related. Also notice driving at high speeds then letting off the gas you hear an almost backfire, kind of ping noise.