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1993 suburban breaking problem
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bambam70
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Jun 9, 2010, 11:33 AM
Post #1 of 16
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1993 suburban breaking problem
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my suburbans brakes lock up (sometimes) fast or slow. the front tires slide. i replaced the pads, there is no scoring or marks on the rotors. i checked for antilock brakeing codes, not any.. please help
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Hammer Time
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Jun 9, 2010, 11:36 AM
Post #2 of 16
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Re: 1993 suburban breaking problem
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What do you mean by lock up?
Does the wheel skid when stopping? Does the ABS kick in. Do the brakes hold and not release?
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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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bambam70
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Jun 9, 2010, 11:41 AM
Post #3 of 16
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Re: 1993 suburban breaking problem
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the wheels slide, the brakes release after you let up on the pedal. no holding. they'll slide even if its moving slowly. so its not the hoses.
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bambam70
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Jun 9, 2010, 11:52 AM
Post #4 of 16
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Re: 1993 suburban breaking problem
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this started, just after i had a new transmission instaled. 1 problem after another. im wondering if the trans shop might have not pluged something back in properly that they had to take loose.
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Hammer Time
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Jun 9, 2010, 12:00 PM
Post #5 of 16
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Re: 1993 suburban breaking problem
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There is nothing electric that can cause that. Which wheel is doing it?
Does the truck have 4 wheel ABS?
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
(This post was edited by Hammer Time on Jun 9, 2010, 12:00 PM)
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bambam70
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Jun 9, 2010, 12:06 PM
Post #6 of 16
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Re: 1993 suburban breaking problem
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yes 4 wheel abs. both front wheels. if it were pulling to one side, that would make more since. but its both. and it does'nt do it every time. but it is doing it more often.
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Hammer Time
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Jun 9, 2010, 12:09 PM
Post #7 of 16
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Re: 1993 suburban breaking problem
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That could be a master cylinder problem but the ABS should be preventing the locking up from happening. I assume the ABS light is not on.
Is this vacuum assist or hydroboost?
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
(This post was edited by Hammer Time on Jun 9, 2010, 12:10 PM)
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bambam70
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Jun 9, 2010, 12:20 PM
Post #8 of 16
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Re: 1993 suburban breaking problem
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no, abs light is not on. and no abs codes. thats why im confused. the abs should stop the lock-up, but it isnt. but the fact that it does'nt do it every time leads me to belive it may be the abs board. id like to belive it is'nt, thats expensive. i dont want to replace it if im not sure, that, is, what it is. thot maybe the back brakes might not be working proper, putting to much stress on the front brakes, but the ABS should still keep lock-up from happening.
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Hammer Time
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Jun 9, 2010, 12:24 PM
Post #9 of 16
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Re: 1993 suburban breaking problem
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I really have doubts if that truck is equipped with 4 wheel ABS. The system goes through a self test every time the key is turned on so you may have rear wheel only ABS.
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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nickwarner
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Jun 9, 2010, 12:29 PM
Post #10 of 16
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Re: 1993 suburban breaking problem
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Have you checked the rear brakes to rule out seized wheel cylinders? For a vehicle this old its possible.
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bambam70
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Jun 9, 2010, 12:32 PM
Post #11 of 16
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Re: 1993 suburban breaking problem
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its a vacume power booster. if the master cylinder was bad ? would'nt it do it every time? and if its supplying to much fluid pressure, should'nt the ABS regulate that, and interupt it ? thot thats what they do.
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bambam70
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Jun 9, 2010, 12:39 PM
Post #12 of 16
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Re: 1993 suburban breaking problem
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would'nt a seized wheel seal make it do it all the time tho ?
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nickwarner
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Jun 9, 2010, 12:50 PM
Post #13 of 16
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Re: 1993 suburban breaking problem
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if the rear wheel cylinders are seized up they won't move to engage the brakes and the fronts will be the only ones generating braking force.
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bambam70
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Jun 9, 2010, 1:08 PM
Post #14 of 16
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Re: 1993 suburban breaking problem
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rear wheel seals are leaking. saturating the pads. thier not working at all, so now i get to take the diff apart and pull the wheel hubs out. fun fun. hope this fixes it. i'll let ya'll kno. thank you and god bless.
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bambam70
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Jun 11, 2010, 11:06 AM
Post #15 of 16
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Re: 1993 suburban breaking problem
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yep, both rear wheel cylinders were leaking, rear brakes wer'nt workin at all. prob fixed now. thanks.
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nickwarner
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Jun 12, 2010, 8:27 AM
Post #16 of 16
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Re: 1993 suburban breaking problem
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Glad to hear you got it going again. Thanks for posting the fix.
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