Hy Beewrangler, I was afraid you were going to tell me you had the two shoe type, I don't have very much experience with that type. Could it be that the drum itself is out of round, and bumps the shoes around as it turns? Most of the parking brake drums I've seen over the years have some kind of damage, scars, belled in, that kind of thing. I doubt there are too many trucks out there that haven't had there parking brakes left on by accident, for a few miles at a time.
