Why do my back brakes lock up??? - S-10 Forum
 
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post #1 of 14 Old 02-10-2008, 04:18 PM Thread Starter
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Why do my back brakes lock up???

Hey im from up north and ever since it has been cold, when i start up my truck and start backing out of my driveway, i tap the brakes and the rear brakes just lock up. It will happen 2-4 times before my front brakes start working in a normal matter. Any ideas of what could be wrong or adjusted??

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post #2 of 14 Old 02-10-2008, 04:38 PM
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Re: Why do my back brakes lock up???

My Cavalier has done this a few times this winter and I would also like to know what it's all about.
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post #3 of 14 Old 02-10-2008, 05:53 PM
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Re: Why do my back brakes lock up???

make sure ur break fluid is full and try to bleed them out u might have air in the lines


my guess
happened to me i did that and it stopped

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post #4 of 14 Old 02-10-2008, 06:34 PM
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Re: Why do my back brakes lock up???

actually, I'm not sure what causes it... but mine do that if it has been raining. After a couple stops everything is normal. Maybe it is a small layer of rust on the braking surface causing a grabbier/more abrasive surface that is quickly sheared off by the braking action.

I don't think it has to do with air in the lines though.


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post #5 of 14 Old 02-10-2008, 07:49 PM
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Re: Why do my back brakes lock up???

Mine do it when its raining or cold Notting to worry bout mines done it forever..

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post #6 of 14 Old 02-10-2008, 07:53 PM
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Re: Why do my back brakes lock up???

Mine do it bad,

On gravel the back wheels will lock and drag down the driveway lol

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post #7 of 14 Old 02-10-2008, 09:22 PM Thread Starter
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Re: Why do my back brakes lock up???

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Mine do it bad,

On gravel the back wheels will lock and drag down the driveway lol

haha thats what mine do. Ill check the brake lines once its not freezing cold with a foot of snow on the ground. Thanks for the input guys
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post #8 of 14 Old 02-10-2008, 09:41 PM
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Re: Why do my back brakes lock up???

I Work At A Brake Shop,,check Your Adjustment On The Rears Or Try To Get The Drums Resurfaced And Adjusted....my Opinion,thanks....
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post #9 of 14 Old 02-10-2008, 09:51 PM
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Re: Why do my back brakes lock up???

G.M. says it is normal for the brakes to grab or make noise on the first or second application. This problem occures after it has sat for a few hours & the humidity is high or has rained. See it all the time. It is caused by rust on the drums or rotors.
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post #10 of 14 Old 02-11-2008, 10:24 AM
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Re: Why do my back brakes lock up???

check to make sure they are adjusted properly... with the wheel s on, you shouldnt be able to freely spin the wheel with ur hand... it should have slight drag... slight is the key word, u should be able to hear a light scrape of the shoes on the drums... also, first check to make sure ur wheel cylinders are not leaking onto the shoes... when shoes get wet (even water) will make them lock up
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post #11 of 14 Old 02-11-2008, 10:41 AM
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Re: Why do my back brakes lock up???

its from moisture getting in there. make sure you have your rubber plugs in your adjuster holes

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post #12 of 14 Old 02-11-2008, 11:27 AM
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Re: Why do my back brakes lock up???

Quote:
Originally Posted by SSBlazerV8 View Post
G.M. says it is normal for the brakes to grab or make noise on the first or second application. This problem occures after it has sat for a few hours & the humidity is high or has rained. See it all the time. It is caused by rust on the drums or rotors.
x2
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post #13 of 14 Old 02-11-2008, 01:10 PM
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Re: Why do my back brakes lock up???

on trucks, the brake bias is also rear heavy because they're designed for hauling lots of stuff in back, and then you need more braking where the weight is. combine with light rust on the front disks and viola.

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post #14 of 14 Old 02-11-2008, 01:56 PM Thread Starter
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Re: Why do my back brakes lock up???

awesom. Thanks a lot again
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