Question about 1988 Chevrolet S-10

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Rear passenger side wheel/brake locking at first touch of pedal

I have a ''88'' Chevy S10 pick up truck. Have had extensive brake work done already. The shoes, wheel cylinder, and all hardware have been replaced & drums where machined. it does not loose and fluid at all and pedal is never soft. But still have same problem. Only the rear passenger side wheel/ brake locks when the pedal is barely touched. sounds like you just slammed on brakes. only does this when you first take off in morning, when in heavy stop & go traffic or in the rain. if you gun the engine for a short distance the next time brakes stop perfect.

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  • rockie4218 Jun 24, 2009

    Thank You! At this point I know there is no air in the lines. Brakes were adjusted by a professional. It does not loose any fluid so I assume it's not the master cylinder. If a brake line was bad wouldn't it be leaking or not stop the wheel? Some on suggested I replace the proportion valve, but said that usually when that is bad you usually have a problem with a front and a rear on opposite sides.

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You possibly have air in your lines. When you bleed them you need to start at the rear passenger, then rear driver, then front passenger and then front driver. If you are certain you have no air in the line then you have a bad brake hose/brake line. Replace this and your problem should go away. If not then the culprit should be the distribution or master cylinder. I hope this helps.

Posted on Jun 21, 2009

  • Matthew Boulden Jun 21, 2009

    When I placed my first answer to this, I assumed that your brakes were adjusted correctly, but you may want to check this also. If the self adjuster is not installed correctly or adjusted properly it will cause this problem.

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