{Chrysler 300} 1963 Chrysler 300 Front Brake Squeal at low speeds when hot

[<mplindahl@xxxxxxxxxxxxx>]

Hello All,

 

I have owned this 1963 Chrysler 300 for over 33 years.  In the last 5 years or so, a RIGHT Front brake squeal has been happening as follows.

 

1. It does not happen when I start driving and the brakes are cold. The brake shoes were changed to new shoes and new wheel cylinders (done at a shop) and this also happened a bit on the previous set of front brake shoes.
2. It happens when slowing down to a stop – between 10-0 MPH.
3. It has got a bit better as the brake shoes have worn to match the curvature of the drum.
4. I swapped another drum that was not cut as thin and the results were a little bit better at first, but the sound was still there, just a different tone of squeal.
5. As the brakes heat up, the sound begins and gets gradually louder.
6. I have taken the drum off and cleaned the dust out and wiped the brake shoes off.  After a short time, the sound comes back.
7. If you have ever heard a dump truck slow down next to you at a stop light, this is what it sounds like.

 

Questions:

1. Could the brake shoe be vibrating against the back plate?
2. If you have ever taken your wet finger and rubbed it against a half filled wine glass and then heard a sound, it seems like that.
3. At one time, I think I read that the drums should be resurfaced with a cross-hatched pattern?  Could this reduce the squeal?

 

I have not cut the drum because I know they are hard to locate and I prefer to not cut them any more than what is needed.  Any suggestions are appreciated.  Yes, I have read the shop manual.

 

300ly,

Mark Lindahl

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