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Do you always need to replace rear brake drums?


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Wcd7109
New User

Aug 6, 2020, 12:48 PM

Post #1 of 6 (317 views)
Do you always need to replace rear brake drums? Sign In

I have a 2006 Toyota Tacoma pick up that's going to need new rear brake pads soon. My mechanic claims that you always replace brake drums now. He says it's cheaper to replace them then to have them machined. Is this true?


Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Aug 6, 2020, 1:51 PM

Post #2 of 6 (312 views)
Re: Do you always need to replace rear brake drums? Sign In

Are you changing brake pads or brake shoes?

If you have disc brakes, then you have brake pads and rotors. If you have drum brakes then you have shoes and drums.

If you have disc brakes, then I agree with the shop. It's cheaper to replace rotors than machine them.

If you have drum brakes, then no you don't automatically replace drums.



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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



(This post was edited by Hammer Time on Aug 6, 2020, 1:52 PM)


Tom Greenleaf
Ultimate Carjunky / Moderator
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Aug 6, 2020, 2:00 PM

Post #3 of 6 (301 views)
Re: Do you always need to replace rear brake drums? Sign In

A truck with REAL drums only? It's not so easy IMO only would see what you use a truck for and decide or suggest if drums could be machined at all by thickness.


Trouble where I am it's not legal to also grind the shoes to exact proper the new out of box is expecting a new drum's size I would sure hope. That's were break in, extra dust to dump out and lousy ability for some miles with really using brakes matters so default is going to be new stay on the safe side and doubt they are so costly it would make that much a difference.


Side note - real HD drum brakes last for ages wear wise if they are and gone in the back this has been worked or higher miles makes it highly recommended now,


T



Wcd7109
New User

Aug 6, 2020, 3:04 PM

Post #4 of 6 (282 views)
Re: Do you always need to replace rear brake drums? Sign In

Thanks for your quick response. Sorry, I used the wrong term. They are drum brakes and I have shoes. Under what circumstances would it be necessary to machine or replace the drums? I haven't overheated the brakes, and still havePM material on the shoes. Do you think these guys are trying to scam me?


Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Aug 6, 2020, 3:09 PM

Post #5 of 6 (280 views)
Re: Do you always need to replace rear brake drums? Sign In

If you have no scoring in the drum surface or no noticeable lip on the edge, I personally wouldn't bother with the drums.

Now, if they are showing any excessive wear, I would resurface them. They are a little too pricey to just replace unless they show severe wear.



~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



Tom Greenleaf
Ultimate Carjunky / Moderator
Tom Greenleaf profile image

Aug 7, 2020, 1:05 AM

Post #6 of 6 (248 views)
Re: Do you always need to replace rear brake drums? Sign In

? What does PM material on the shoes mean? If it has "plenty" they probably just need cleaning (dumping out brake dust) and fix or adjust to work properly again.


OP, these are the type of almost "forever brakes" rear does nothing on a light loaded pick up or a lot if you load it so require routine dumping out dust, re-adjust and look for broken parts or hydraulic wheel cylinders they do NOT work.


This type brake requires routine cleaning and lubing about when tires get rotated and last decades or lots the problem was/is they don't "self" clean like a disc type nor have exposed parts all depends on how they are used.
The "arc" of inside metal of drum wears to match the shoes so stay (when cared for) matching or start all over if plain worked too hard or a failure.
Each type has a benefit and a reason these are thought of as crude but last essentially forever for HD (heavy duty) use.


A problem both then and worse now is nobody takes routine care of things like that so they are ruined from neglect as anything would be.
Disc brakes sling dirt/dust as they wear and self adjust plus sling off water so work faster if damp wet so choose (for use purpose) which to use.


Last - techs don't get it because they are now rare worse some used for parking brakes you have both in one brake is double trouble in each of those dump it all was IMO highly stupid to do that by design.


Last pounding on this: Over the road tractor trailers, just the trailer, trains, planes, stuff before engines like a horse and carriage used them are a staple of stopping a wheel with friction since all time of a wheel dammit!


The MONSTER problem was a driver had to have a clue how to drive and when to clean out the dust/mud if the case plus hard to make self servicing or all techno so some fool idiot light told you when to clean them out and check! Nobody does, isn't aware nor recall what to do? They are in full use right now and for next year designs for HD is the key word,


Tom







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