Is it my Master Cylinder or Wheel Cylinder?

Ok, my brakes suck right now in my 66 mustang. It is all stock brakes. I know the driver side front and the passanger side rear wheel cylinder are leaking (a little). now they dont leak a lot but just a little. but when i brake i have to pump the brakes to get them to get pressure. And when i have pressure and just have my foot on the pedal (like at a stop light) the pressure pisses away, and soon my foot and pedal are on the floor. But, there is no fluid missing from the master Cylinder, and the master isnt leaking. I bleed the brakes, and it didnt help. (only the back brakes, brcause i couldnt get to the front bleeder screws. How do you guys do that?) where would the pressure be going, there isnt that much leakage form the wheels.

THanks

oh, and all drum, and no power brakes.

HI
Check at the fire wall on the inside and also pull the rubber cap on the inside where the rod goes into the master cylender. You might see fluid there. Any way It sounds like the Master.
Tim[img]/phpBB/images/smiles/icon_spin.gif[/img]
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I have had the same problem with my pick-up.The master cylinder was bad and the fluid just leaked around the seals inside and the pressure would slowly fade away.There was no fluid loss as all the leaking was internal.Having said that it sounds like you have some other problems that need addressed right away.You need to fix the leaky wheel cylinders and bleed the front brakes as well.If one of the front brakes had air in the line your brakes will feel crappy no matter how many times you bleed the rear.
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