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Rear brakes make rhythmic scraping sound when applied.


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It took years, but I think I finally figured it out.  

 

After having my brakes serviced by a local Ford dealer, they started making a strange scraping noise that suggested an out-of-round drum.  "Scrape-Scrape-Scrape-Scrape-Scrape".  Pulling up on the parking brake, while applying the service brakes, seems to help, but it's no permanent fix.  

 

It drove me crazy for a long time, trying to figure out what it was and how to fix it.  Then I finally broke down and just replaced everything (Drums, shoes and self-adjusters), but a few days later, it was back.  Aaaaaaaaargh!  

 

Later I stumbled on an article that explained what it was and how to fix it.....  Now I can't find the article! ?

 

Basically it said that the shoes have to be seated in the drums when replaced to stop this from happening.  

I don't remember the details, but it was something to the effect of "pull parking brake up 8 clicks (+/-?), then drive backward at 5mph for 800 feet, then forward at 5mph for the same distance.  

Then everything should be fine.  

 

I don't have a torque wrench to adjust the parking brake with, so I haven't done it yet.  Has anyone tried it?  

 

I swear to God...  My next van is going to have 4 wheel disc brakes! 

 

 

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14 hours ago, Timbo said:

My next van is going to have 4 wheel disc brakes

Disc brakes come with there own set of issues, watch out what you wish for.

 

The seating the shoes is a good idea.  Making sure the shoes are centered is also needed.

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