Front Drum Brake Issues

Oldmanmopar said
All old front drums and some rear drums had a spring around them to keep them round while under heat unless they were finned.

BillGrissom said
Interesting. I wondered what the springs around my 65 Dart drums were for. I had assumed they were to increase heat transfer, but your description makes more sense.

I read an old service bulletin back in the early 60's,, said spring was to help eliminate the chronic brake squeel the cars had in the 50's and 60's..

I remember that squeel very well, in our 56 Plymouth, my dad told me the noise was from hard linings,, go figure..