Dave,
I have only changed the brake shoes about a dozen times over the years, but I don't think I have ever seen that before.
I did a GOOGLE search and came up with this link:
http://www.rv.net/forum/index.cfm/fu...g/19680801.cfm
Not much help because like always, it seems like there are two sides to every story.
How many miles are on them? And are both the right and left wheels the same? Are these still the asbestos shoes, or are they the new composite?
If it was me, I'd take it to my NAPA dealer, who is a friend, and ask him.
But in the end, I'd probably replace them, just so I didn't have to worry about it as I was driving. We have enough to worry about.
Keith