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



Had the same problem on my friends g  tried everything including a new drum spring he changed the front to disc brakes no more dump truck screeching thanks barry

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On Sat, Oct 8, 2022 at 1:26 PM, mplindahl@xxxxxxxxxxxxx
<mplindahl@xxxxxxxxxxxxx> wrote:

Hi Mike,

 

I thought about lubricating the back plate, but I have not done so yet.  It would seem that the shoe can vibrate against the back plate at low speeds when my foot is gradually easing up on the pressure.  Why would this be more prevalent when the shoes are hot?  Thanks again!

 

Mark

 

PS – Would white grease or brown wheel cylinder grease be a good choice?

 

From: 'mwl1967' via Chrysler 300 Club International <chrysler-300-club-international@xxxxxxxxxxxxxxxx>
Sent: Saturday, October 8, 2022 12:22 PM
To: mplindahl@xxxxxxxxxxxxx; '300 Club' <chrysler-300-club-international@xxxxxxxxxxxxxxxx>
Subject: RE: {Chrysler 300} 1963 Chrysler 300 Front Brake Squeal at low speeds when hot

 

Mark,  have you lubricated the brake shoe contact points on the backing plate? Are you sure you have the front shoe in the forward position and not mixed up? Have you tried new springs? 

 

Mike

 

 

 

Sent from my Verizon, Samsung Galaxy smartphone

 

 

-------- Original message --------

Date: 10/8/22 9:32 AM (GMT-07:00)

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

 

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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