When i step on brakes the rear end grabs adn swats down

The greasy one has a seal leaking between the backing plate and the brakes (axle seal) which in turn will cause your brakes to grab on that wheel when you apply the brakes. Remove the axle and replace the seal. Then thoroughly clean the brake shoes and backing plate until they appear bone-dry like the other side. This should solve your problem. Make sure the rear-end grease level is full when you finish.

Check Rear Brake Drums Probaly Need To Replace They Get Out of Round And When Braking They Lock Up And The Rear Will Swat Down

There are many possibilities that can cause car to make noise.

It's actually from where the noise is coming from. Front end or rear end. From engine area or from inside the steering or from brakes.

There is N-number of possibilities for the car to make grinding noise or any other kind of noise.

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For step by step troubleshooting this problem, I suggest you to refer the help link mentioned below. Its a complete solution with proper explanation to identify the cause of problem: ------

Click the link below: -----

CAR NOISE ISSUES
http://alltypesofpartsreplacing.blogspot.com/2012/11/car-noisesnoisy-cargrinding.html


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These will help.
Thanks.

is this the front brakes doing this?? or the rear?? i would recomend changing pads and rotors and drums(rear) and shoes(rear)

Check front end steering linkages for any play, as well as rear brakes for sticking or grabbing as well. Not unusual for a rear brake grabbing, to cause front end to want to wander.

leaking brake fluid causing it lock up and grab ,slight leak anything more and it just will not work at all

This wire feeds from the Brake Release to a "Y" (viewed from the bottom with the front pointed down) configuration under the car that splits to go to each rear brake assembly. You do not have to disconnect the wires from the brakes, just from the point where the wire from the brake release meets the "Y" part. it is generally a type of wide and curved hook to grab the rear wires and pull it forward to engage the brakes. Release the brakes making sure that the car is in park or in gear so that it doesn't roll., take the "hook from the rear wire and the brake release inside the car. I always TAPE securely the wire from inside the car to the end that needs to go through the hole to the rear wire and pull the new one with the old one. It works for me, it is sometimes more difficult than easy, but it usually works if you make sure that snags are delt with before you pull the rear end of the new wire from the front part of the old one.

I would have my master cylinder checked for leaks and have my back calipers or drums checked for bad seales or sruck brake pistons

Possibly a frozen/siezed up emergency brake cable or rear brake(s)

I have changed brake pads before and did not lose any fluid but air can get in the lines. Brake fluid is not compressible while air is, so if you get air in your lines it compresses when you hit the pedal there fore the pedal goes down to floor and your brakes dont grab that good. You can either bleed the brakes your self by starting at the wheel furthest away from the brake fluid reservoir and unscrewing bleeder hose and letting the fluid just bleed out. (get something to catch it and dispose of it properly). Make sure you keep the reservoir under your hood full of brake fluid while letting the other stuff by tires bleed out. Work your way from the furthest tire first and the closest one to the reservoir last. GOODLUCK!