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Drums locking up

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Old Dec 15, 2006 | 10:22 AM
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Drums locking up

I did a search and didnt come up with anything. My rear brakes keep locking up. Well they locked up again and I wrecked my car. I redid the fronts and they are fine. I was going to do the back but everything looked good.
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Old Dec 17, 2006 | 12:08 PM
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anybody?
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Old Dec 17, 2006 | 12:37 PM
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Car: 86 Trans Am
Engine: 408 stroker sbc
Transmission: TKO600
Axle/Gears: Moser full floater m9, 3:70 trutrac
what do you mean locking up? do they do it all by themselves or when you hit the brakes? these cars do not have antilock brakes so they tend to do this. need a little more info
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Old Dec 17, 2006 | 03:00 PM
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Its not at anytime in particular but as I come to a stop they lock up whether it be raining or dry Ill tap the brakes to slow down and they will lock up. I just redid the front brakes with metal lines,rotors and brake resevoir. I put new aluminum drums on the back and the shoes looked ok. Its a 92 checy camaro.
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Old Dec 17, 2006 | 04:26 PM
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From: So.MD
Car: 92rs
Engine: 350
Transmission: 350
Axle/Gears: 3.73/Moser 12bolt
did it do this b4 you did the work or after ?

I personally change the pads / shoes anytime I do drums or rotors
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Old Dec 17, 2006 | 05:25 PM
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You might consider installing a rear end with disc brakes.
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Old Dec 17, 2006 | 06:25 PM
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It was doing the problem before and after I did anything to the brakes.

And how much to upgrade the brakes. After wrecking my car I barley have enough mto get it back together.
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Old Dec 17, 2006 | 06:29 PM
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You can buy a complete rear for a couple of hundred, I am not sure if you can just upgrade the brakes, do a quick search.
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Old Dec 17, 2006 | 06:34 PM
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Try this
https://www.thirdgen.org/forums/brak...ight=drum+disc
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Old Dec 17, 2006 | 09:51 PM
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Most often, "rear drums lock up" is some different language that I don't understand real well, for "front brakes don't work".

Quit working on the rears, and fix the fronts. That's why the rears lock: the fronts aren't doing their normal share (90% or so) of the work.

Most likely it's the rubber lines.
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Old Dec 17, 2006 | 10:18 PM
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My front brakes are all new, new calipers , hubs, cross drilled rotors along with pads. I have even replaced the master cyclinder.
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Old Dec 17, 2006 | 10:21 PM
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How is the MC working, have you bled the entire sytem lately?
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Old Dec 18, 2006 | 05:43 AM
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My front brakes are all new
All except for the ONE PART that often causes the problem you're having...
Most likely it's the rubber lines
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Old Dec 19, 2006 | 06:10 PM
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Car: 86 Trans Am
Engine: 408 stroker sbc
Transmission: TKO600
Axle/Gears: Moser full floater m9, 3:70 trutrac
if the lines start breaking bown inside and a little bit of crape gets in to the line it can cause the brakes to lock up by themselves sometimes. had it happen in an old work truck, but it was caused by bits of ice forming in the brake lines
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Old Dec 20, 2006 | 06:45 AM
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I even have earls ss lines in the front so when I get the car back from the body shop i will try a few mor things.
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Old Dec 20, 2006 | 09:23 PM
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Originally Posted by redlsone
I even have earls ss lines in the front so when I get the car back from the body shop i will try a few mor things.
You best bet is to replace everything, brakes are soooooooo important you need to make sure they are working properly to avoid another accident. Best of luck to you, G O D Bless, get your car fixed right and happy holidays.
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Old Dec 20, 2006 | 09:44 PM
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yeah im replacing the lines in the back, the proportioning valve and the brake booster and that pretty much covers everything. Thanks for the words and happy holidays to you.
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Old Dec 20, 2006 | 10:39 PM
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Originally Posted by redlsone
yeah im replacing the lines in the back, the proportioning valve and the brake booster and that pretty much covers everything. Thanks for the words and happy holidays to you.
I hope you get your car running again in mint condition, Please send me pics when you have it all done.
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Old Jan 30, 2007 | 01:04 PM
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From: Illinois
Car: 89 Firebird
Engine: 350 Ramjet
Transmission: 700R4
Axle/Gears: GM 9 bolt 3:27
I would check and clean the rear shoes with some brake cleaner and light sanding, make sure the drums are free fron ANY oil or grease/fluid. the shoes bay be saturated with any of the above including water and you more than likely never see it. try cleaning and sanding everything in the drums first if that doesn't help replace shoes maybe drums
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Old Jan 30, 2007 | 01:30 PM
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From: Rock Hill, SC
Car: 91 GTA
Engine: 350 TPI
Transmission: 700R4
Axle/Gears: stock
dont know if you have fixed the problem yet, but when i had my 86, i had the same problem with the wheels locking up. diagnosed the problem as the wheel cylinder. replaced that and never had a problem afterwards. hope that helps
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