DISC BRAKE REAR

[alleycustom]

I DRIVE A 1940 FORD WITH A VERSAILLES DISC BRAKE REAR. FROM TIME TO TIME WHEN SLOWING (10 MPH?)TO A STOP, THE BRAKES CHATTER & GRAB. HAVE NOT FOUND A SOLUTION, DON'T KNOW IF THE INSTALLATION WAS CORRECT, BUT BEFORE TEARING IT APART (OR OUT), WANTED TO ASK THE FORUM IF THERE'S A PROPER APPROACH TO MAKING THE CHATTER GO AWAY. HAVE TRIED APPLYING THE EMERGENCY BRAKE TO EXERCISE THE CALIPER PISTONS, BUT NOT SURE THAT'S HELPING.
APPRECIATE ANY THOUGHTS ON THE SUBJECT.
THANKS, STEVE HELLER (FL)