Duramax Diesels Forum Truck of the Week
  #1  
Old 09-13-2013, 06:18 PM
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smarquis smarquis is offline
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Default Rear Brakes Wear Fast

Does anyone else have a problem with their rear brakes wearing ridiculously fast? I get about 15,000 miles out of mine rear brakes and 50,000 out of my front brakes. Also, when I go to change the pads, the rear rotors are usually cracked from the excessive heat. Even the after market ones I got 80,000 miles ago that were slotted were cracked so badly that the shop refused to put new pads on them. I have after market bigger brakes and rotors on the front that I have only changed once since that time, but i have replaced the rear about 4 or 5 times. I have now resorted to just buying new rotors/pads at Pep Boys because they are really cheap - rotors are only about $35 a piece - but still it is a pain in the rear.

So, obviously, I kind of drive fast (or like a "bat out of hell" to quote my wife). However, I still don't think the rear brakes should wear so quickly. Anyone else have this problem? Any suggestions? I have the motor out to get rebuilt now so it may be a good time to look into the issue.

Thanks!
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Old 09-13-2013, 06:45 PM
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Sounds like something is defiantly wrong with your brake system. Can you get the fronts to lock up? Do they all lock up together or rear first?
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Old 09-13-2013, 07:12 PM
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How rusted are the sliders?
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02 2500HD CC/LB dmax/alli "The Limo"

BIG THANKS TO: Mike L, Steve, Trent, Guy, Dan, Ruben, Josh H, Scott, and everyone else who has put a hand in to help me.

best time to date: 12.39

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Old 09-16-2013, 10:36 AM
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Default

I can't get any of my brakes to lock (truck has anti-locks).

Rusted sliders may be an issue elsewhere, but not here in Las Vegas. I did find, however, that on my last change, that the slider grease was essentailly fried onto the slider. I guess that is just the excessive heat (and I may have used a cheaper grease without realizing it. Still doesn't change the fact that I have seen at least a couple of rotors spirdercrack does it? Would the heat from a pad that was wearing unevenly be sufficient to do that? Thanks.
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Old 09-16-2013, 10:42 AM
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It's pretty apparent that the rear brakes are dragging. Isn't there a way to test the ABS system with a TECH II? Thought I seen something like that but not 100%

Friend with a Dodge has the exact same issue but with the front. Never did figure it out
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Old 09-16-2013, 10:55 AM
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Only thing i can think of is sticking calipers but you would notice that when you compress the piston to put new pads in. something isnt letting the rear brakes release pressure after hitting the brakes. whens the last time the system had the brake fluid flushed?
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02 2500HD CC/LB dmax/alli "The Limo"

BIG THANKS TO: Mike L, Steve, Trent, Guy, Dan, Ruben, Josh H, Scott, and everyone else who has put a hand in to help me.

best time to date: 12.39

motor died/bent rods = 3/11/11
back from the dead 7:04pm 4/9/2012

driving a turboed Samurai now
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  #7  
Old 09-16-2013, 11:25 PM
redrob redrob is offline
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Do you tow with a trailer brake controller or not?
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Old 09-17-2013, 01:24 AM
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doing burnouts??? I'd find it hard to believe both rear brakes are dragging together, unless its something upstream, and if it's enough to make the pads wear that fast you shouldn't be able to spin the wheel freely if the ass end was off the ground. Try jacking up the rear and spinning the tires.

could be the ebrake be hung?
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Old 09-17-2013, 01:42 AM
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if your master cylinder is bad it could be pushing all of your fluid to the rear brakes, if you feel like bleeding your brakes you good take the lines off of it and see if it sprays evenly.
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Old 09-17-2013, 03:57 AM
jlawles2 jlawles2 is offline
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It sounds like your master cylinder is not releasing completely. Both front and rear. I have 160k on one truck (not a lot of trailer pulling) and 120K on my other both on original brakes and both still look new.

You could also have water in the master cylinder which is causing issues during and after braking.
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Old 09-17-2013, 06:06 AM
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Quote:
Originally Posted by Kappa9012 View Post
doing burnouts??? I'd find it hard to believe both rear brakes are dragging together, unless its something upstream, and if it's enough to make the pads wear that fast you shouldn't be able to spin the wheel freely if the ass end was off the ground. Try jacking up the rear and spinning the tires.

could be the ebrake be hung?
The e brake doesn't utilize the same surface as the brake pads. Instead of using the rotor it uses the inside of the rotor, similar to a drum brake. If it was hung it wouldn't be noticeable because you would go through the e brake pads in a very short time. I don't believe he is changing e brake pads just normal pads.
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Old 09-17-2013, 09:22 AM
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I've seen OLD rubber brake lines cause the caliper to drag but IF you're developing that kind of heat to crack rotors as you describe I'd say the ABS is malfunctioning and holding pressure somehow in the rear. I'd run some ABS system checks.
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83 CJ7 (slug but cool)
07 Audi A4 ( I like German Girls they're HOT!!)


LIFES JOURNEY IS NOT TO ARRIVE IN HEAVEN SAFELY IN A WELL PRESERVED BODY,
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TOTALLY WORN OUT, SHOUTING,HOLY SHIT WHAT A RIDE!
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Old 09-17-2013, 09:30 AM
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Quote:
Originally Posted by MACKIN View Post
I've seen OLD rubber brake lines cause the caliper to drag but IF you're developing that kind of heat to crack rotors as you describe I'd say the ABS is malfunctioning and holding pressure somehow in the rear. I'd run some ABS system checks.
this is what im thinking but ive seen a brake fluid flush clean issues like this up.
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02 2500HD CC/LB dmax/alli "The Limo"

BIG THANKS TO: Mike L, Steve, Trent, Guy, Dan, Ruben, Josh H, Scott, and everyone else who has put a hand in to help me.

best time to date: 12.39

motor died/bent rods = 3/11/11
back from the dead 7:04pm 4/9/2012

driving a turboed Samurai now
Tailgate Crew Member #4
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Old 09-17-2013, 09:37 AM
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Quote:
Originally Posted by Cknight199 View Post
The e brake doesn't utilize the same surface as the brake pads. Instead of using the rotor it uses the inside of the rotor, similar to a drum brake. If it was hung it wouldn't be noticeable because you would go through the e brake pads in a very short time. I don't believe he is changing e brake pads just normal pads.
good to know
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Old 09-18-2013, 11:35 AM
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Quote:
Originally Posted by lifteddirty View Post
if your master cylinder is bad it could be pushing all of your fluid to the rear brakes, if you feel like bleeding your brakes you good take the lines off of it and see if it sprays evenly.
Something like this is what I have essentially thought all along. Truck always seemed to stop pretty well, but as I said before I have the bigger brakes on the front so that may have compensated somewhat for not getting sufficient pressure to the front calipers?

I flushed the brake fluid about 1-2 years ago, and it did make a big difference on pedal feel, but I don't think it made any difference on wear.

Thanks to everyone for their suggestions. They are appreciated!
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