Question about 2002 Chevrolet TrailBlazer

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What cause the brakes to lockup

Brakes are locking up

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Bad caliper or trash in the line. I would think that it would be the caliper or a bad brake cylinder. This is the hydraulic cylinder on a disc brake that wont release or it would be the Brake cylinder on drum brakes (usually the rear brakes on newer cars).

Posted on May 14, 2014

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Posted on Jan 02, 2017

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1996 Tahoe front driver side wheel lock's up have change everything both sides and booster new only left side locks up gets hot


When you say you've changed EVERYTHING, you mean brake pads, calipers, and rotors? Did you include the rubber brake hose to the caliper? Many people overlook this as a possible problem, yet it can cause lockups on occasion because the inner liner can collapse and act like a check valve.

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I was driving then i stoped and tryed to go again but couldnt all 4 of my brakes locked up


dont drive this man killer, please.
the brake pedal is not comming all the way back or the brake rod
to rear of MC is not at spec clearance. this causes 4 wheel lockup
and this happened do to the rod there not allowing the mC piston
to unblock the relief ports.
see here, see them ports, open?, yours are not, and are a man killer.

http://static.howstuffworks.com/gif/master-brake3.jpg

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Rear brakes lock up


If they release after time, replace the rear brake hose/s. Also check to see if the emergency brake cable is releasing all the way. If the brakes are rubbing, they heat up and swell to the point off lockup.

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My brakes randomly lock up on my 2004 chevorlet impala


If your brakes were "locking up" as you describe, it would be interesting to see. Brakes rarely self-apply. Lockup may occur after you apply the brakes as they may stick and won't release, but to have them just apply while driving is almost impossible. What you are describing sounds more to me like a massive vacuum leak. What this will do is reduce intake vacuum and steal all the power from the engine, and the brake pedal will go stiff as a result of the power brake booster losing its vacuum assist. You need to find the source of the vacuum leak and correct it.

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When coming to a stop my Dodge Ram 2005 wants to and at times stalls. While putting on the brake and just prior to stopping the RPMs drop and the truck will stall, sometimes if I let up on the brake and...


It could be caused by a throttle body issue or an EGR valve problem, but it sounds more like your transmission torque converter clutch may be locking up. This can be cause several reasons. I'll list the most common. First check your transmission fluid. If its low it can cause the torque converter to lock up at low speeds. Next, if the transmission is a 545RFE the problem could be caused by the trans filter leaking at the seal. You will need to drop the trans pan and inspect the seal. There is a round filter and a flat one. The seal is up in the transmission where the flat filter plugs into the transmission. A new filter from Dodge will come with a new seal. These are the two most common causes of torque converter lockup. Try and slip it into neutral when you come to a stop and see if it dies. May be more of an indication of a torque converter lockup condition if it does.

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1995 Oldsmobile ciera rear brakes lockup


The brakes most likely need to be replaced. The rear brakes are a drum brake which have a tendency to lock up when they get worn

Jan 22, 2011 | Oldsmobile Cutlass Ciera Cars & Trucks

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Rear brakes lockup when you touch the pedal


there is a brake regulator on modern systems which controls the power between the front and the back breaks this maybe defective

when a car breaks most of the breaking force is placed on the front breaks as that is where most of the energy is heading so the car sinks down. if the same amount of breaking force is placed on the back wheels as they rise they have less friction as the weight is forward so they will lock up.
the device is designed to maintain more force to the front, if it fails the system will apply even force to all wheels.

recommend cosulting a certifed garage or local dealership about this problem.
Warning; continual driving with defctive breaks is illegal and may result in injury or loss.

Nov 13, 2009 | 1996 Chevrolet Cavalier

2 Answers

1987 CHRYSLER FIFTH AVENUE REAR BRAKE LOCKING UP


Check axle seals for seepage. Also wheel cyls. If drums are old, they may be too thin and becoming "egg shaped" which will also cause lockup. You need to check all three items to find your problem. To check drum thickness have any brake shop measure inside diameter with an inside micrometer The min diameter is stamped into the brake drum on the outside edge.

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1 Answer

87 honda accord


Probably a bad torque converter lock up solenoid...

Try starting it in neutral, and putting it in drive without your foot on the brake (I know the car will take off in quite a hurry if it doesn't stall but it's an easy way to check for this)

If it doesn't stall, apply the brakes, and if it stalls then, it definitely is a bad lockup.

I don't know if you're familiar with the torque converter function/operation, but where it is a fluid (liquid) and not solid coupling with the engine, lockup is used at certain road speeds/engine RPMs to get rid of the power loss that always occurs between the pump and the turbine of the torque converter. It mechanically (through transmission oil pressure) locks both parts of the converter together so it then acts like the engine crankshaft is bolted right to the input shaft of the automatic transmission.

But, as you might imagine, this system has to unlock the converter when you apply the brakes for the same reason applying brakes without the clutch on a manual transmission stalls the engine.

Bad lockup solenoid will cause this to happen... The converter stays in lockup and as soon as you try to stop the vehicle, you also stop (stall) the engine.

It also might be something else but I'd say I'm about 90% sure on this one.

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2 Answers

Brakes


calipers stiff moving or slide bolts seized in the bore

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