When I brake, the back wheels are locking up and the back shocks are compressing bringing down the back end. The driver side shock's mounting bracket rusted through and was yanked out through the wheel well from this.
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Re: the back wheels lock up when i hit the brakes
Then it's either the wheel cylinder is no good, or the brake line is collapsed internally, and is acting like a one way valve. Not allowing fluid to be returned to the reservoir when you release the brake pedal.
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Most likely you have a problem caused by rust or some other corrosion that made it lock. You will need to try prying on the wheel to unlock it or remove the tire and then try removing the brake drum or checking the break pads and disc. This depends on which you have, brake drum or disc. Sometimes it takes a little pounding on the brake drum to free it, just so you don't hit too hard so it dents or bends.
sound like you have a brake caliper that has went defective.need to replace this item and should take care of the problem.because when you applied pressure to the brakes the brake caliper started to close so the brakes could tighten against the brake rotor to slow vehicle down and some times these calipers will stick down holding pressure on the wheel disc and cause the wheel to still have the brakes holding down the brake shoes against it not letting pressure to release from rotor and this is what caused it to stay locked up its not releasing to allow to allow wheel to spin free.best bet is to replace the brake caliper.you can pick one up at parts place or local junk yard and are not highly expensive but I would go with new one if possible. to insure this does not happen again this is very dangerous could cause you to have a accident so I would get fixed before driving again.safety first .hope this helps you out so I would replace the brake caliper and also put a new set of brake shoes on it.its not hard to put on easily fixed. thanks 10 zacks
bleed off the oil at the cylinder one at a time and see which brake circuit is at fault. Re apply the brake pedal and see if it locks up on that wheel again. If it does the fault will be in the master cylinder and it will be best to replace it. If both wheels lock up then check for a failed rubber brake hose from the main line to the wheels as they can break down internally and produce a one way valve effect.
you need to take off the rear wheel and there is a hand brake hole in the drum on the disc. you locate the hole with the adjuster.. make sure the hand brake is not on. the leaver for the hand brake take the cable off if the brake is locked the leave will let you take it off. then get a peace of wood and put it on the leaver and hit it back with hammer on the wood not the leaver. then take the screw out for the locator of the disc. and hit the disc with rubber or plastic hammer going round the disc. not to hard just to get it to move when of find out why the hand brake is locked in the first place. ( prob be the shoe's pins ) change the parts. while parts off give good clean and put some copper grease on the parts that move. huck back up the cable and check disc drum part for damage. screw the adjuster back down and refit. when disc back on adjust the brake with the hole lined up and move back and forth until the brake is locked then turn back one point on the adjuster check the disc turns and then use the hand brake. if still an bit hard to move after hand brake off nock the adjuster back down one more and test again. if all well put wheel back on.
It sounds more like your rear end has a bad bearing or a bad pinion gear. If it has high miles it may be time for a rebuild. It could be brake related also, take off the back drum and see if anything is rattling around in there or broken. If your not hitting the brakes they shouldn't engage.
If you have drum brakes on the rear and I am pretty sure you do, and you had to remove the drums you will need to adjust the rear brakes back to the point of almost touching the drum while jacked up and spinning the tire. Not to tight. The brakes are probably traveling so far to hit the drum that they lock up. This will be more noticeable when raining or damp weather. Hope this helps.