Found the problem, thanks to Alex sharing his story.  The whistling noise
seemed to come from the rear passenger side, so I pulled the brake drum
there.  And a short spring fell out.  Turns out the rear shoe hold-down pin
(that is probably *not* the correct name) had come free and fallen out of
the backing plate.  So floating around inside the drum were the spring and
the small plate that the pin holds on to.

So I need a new hold-down pin.  I'm assuming these are a standard size and
will head over to the FLAPS to see if I can pick up a replacement.

Thanks for the suggestions guys.  This list is such a great resource!

Rick

On Thu, Mar 14, 2019 at 1:17 PM Alex MeVay <alex@mevay.org> wrote:

> I had similar symptoms that turned out to be a broken spring grinding
> itself to pieces behind the brake drum.  Quick fix to remove the
> broken parts, then replaced the spring from a $20 spring kit later on.
>
> Alex
>