I have a challenger with power disc. The last time I drove it I noticed the pedal felt a little different as it seemed to have more travel to get the car to come to a stop. I then tried to slam on the brakes to see if the brakes would lock up, but they didn't, the car slowed to a stop, but not as fast as it used to. I checked the fluid in the MC and both resevoirs were full, but the front resevoir fluid was a milky tan color. I know there are no leaks. I was thinking at first the vacuum hose might have a leak, but the discolored fluid has me puzzled. Is the MC bad? How do you know or check to see if your MC isn't working?