Without warning my brakes are locking up and skidding

CINDYMARIE69

MEMBER
1994 BUICK SKYLARK
100,000 MILES

When I put on my brakes, the rear brakes lock up and I slide/skid to a stop and it happened rather suddenly, no warning. My pads are good so it isn't that. What might be the problem? (94 Buick Skylark) The first time it happened, there was an unpleasant loud clunking noise under the car and then when I applied the brakes, the car didn't stop. It has been running really rough even before that but the brake problem is a sudden new development. All I know for sure is my pads are not worn at all and there was no grinding/squealing leading up to the event. Thanks for your help :)

Saturday, December 31st, 2011 AT 5:47 AM

4 Replies

RASMATAZ

MECHANIC
75,992 POSTS

Check the wheel cylinders and the proportioning valve

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Saturday, December 31st, 2011 AT 5:56 AM

SATURNTECH9

MECHANIC
30,869 POSTS

So you changed the brakes yourself?Front or rear?You have disc brakes in the front and drum brakes in the rear?

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Saturday, December 31st, 2011 AT 5:58 AM

CINDYMARIE69

MEMBER
2 POSTS

Thank you, will check on cylinder/valve situation. And @ saturntech, No I haven't yet had the brakes changed because I am not sure yet what the problem with them is, that's why I asked for your help. I just know that my pads aren't worn out yet because someone looked. And yes, I do have disc in front and drum brakes in rear. Any info is much appreciated! Thanks

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Saturday, December 31st, 2011 AT 11:40 AM

SATURNTECH9