Bad brakes, one wheel locks up
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Old July 26th, 2010, 08:58 AM   1 links from elsewhere to this Post. Click to view. #1
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Bad brakes, one wheel locks up


Hey gals/guys. Only my front right (passenger) wheel locks up when I firmly apply the brakes. Yes my traction control is out, and ABS as well. Already checked my lines for any pinches or misplaced bends. Any other areas I should check?? All stock brake components with 95K. THANKS
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Old July 26th, 2010, 09:17 AM   #2
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Could be a bad caliper or pads that is binding, as I had this happen to me in my ol' '72 Vega

It could also be more tire wear, a poor contact patch or road conditions leading to the lock up. If not sure, swap the front wheels and take it for another drive and test it out.

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It would still be fun to have a truck that poops speed bumps in fast succession.
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Old July 26th, 2010, 09:27 AM   #3
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The right tire always locks up, no mater what condition the road is, does it always on wet roads, dry roads, and grass. Both tires seem to have approximately the same thread depth, going to swap pads, and wheels when I get home today. Just some process of elimination.

If the caliper were bad, wouldn’t it show signs of leakage around the cylinders, as I don’t see any fluids leaking from the caliper.
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Old July 26th, 2010, 09:39 AM   #4
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Not necessarily

Years ago, when driving my Vega in the HS days. I had started noticing my car was pulling to the left on occasion. I was a dumb kid, so didn't pick up on the importance right away. One time, while driving down the highway on a hill, this began happening for a minute or two (of course, I was "fighting" the wheel and holding wheel a bit to the right to curb the pulling). When I hit the brakes, due to traffic ahead, the car pulled VERY hard to the right (remember I am holding the wheel to the right at this moment!) and then back to the left when I released the brakes. You can imagine how dangerous this could be

I found that my caliper was not leaking, but the piston was just jammed a bit and would not consistantly retract upon releasing the brakes. When it would "jam", I would have partial brake applied to the drivers wheel only and hence the pulling. When I would hit the brakes, the passenger side would grab much better due to heat-soak on the drivers side. This could be potentially pretty dangerous, so check her out good and PROVE the problem before you continue to drive.

Jazzer

EDIT: I had checked the rotor right away and found the drivers side to be VERY hot due to the binding caliper
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It would still be fun to have a truck that poops speed bumps in fast succession.

Last edited by Jazzer The Cat; July 26th, 2010 at 09:42 AM.
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Old July 26th, 2010, 09:44 AM   #5
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hmmm, going to have to check the caliper then, thanks
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Old July 26th, 2010, 09:54 AM   #6
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Calipers can stick or become completely seized without having a leak anywhere.

Also, if your abs is malfunctioning, that could cause an issue. Another aspect of this to consider is, under how much pedal pressure is this happening? If you have to stand on it to make this happen, it would be perfectly normal for one of the wheels, particularly the right rear, to lock up first due to weight transfer. When you smash on the brake pedal, the car lunges forward, transferring a great deal of it's weight momentarily to the front of the vehicle. And the right rear is quite often the one that becomes 'unloaded' first, which makes it easier for it to lock up.

So if that's the case, it could very well be that nothing is wrong with your brakes.

If this lockup is happening during normal braking, then disregard everything I just wrote and go cheeck your calipers and fix your abs. lol
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