One caller last week had squeaking brakes and asked Tom and Ray for advice. The caller said he had heard from a friend that if he backed up rapidly, and then slammed on the brakes, it might help. Tom and Ray said they’d never heard of this idea. But I’ve heard of this procedure, at least for tightening drum brakes. Maybe the caller said he had disc brakes. I don’t recall. A lot of cars even these days have disc brakes on the front, and drum brakes on the back. If it was the back brakes that were squeaking, the back-up idea possibly might help.
On some cars of yesteryear at least, slamming on the brakes while backing up tightens the shoes against the drums. There is a little geared-wheel-like mechanism that ratchets the brake shoes down so they are closer to the drums, activated by the backing up and stopping action. True, it doesn’t seem like tighter brakes would affect squeaks, but maybe it would help in some conditions.
Anybody know, do car manufacturers still make drum brakes with this back-up tightening mechanism?