brake power loss at low speed on 2001 Ford Explorer Sport Trac

When braking truck slows to 10-5mph and brake pedal travels a bit (like a pressure loss) and you feel what seems to be a grinding noise . I think it may be the booster or master any ideas. Fluid checked and all brakes newer just had new upper and lower balls done ABS light is intermittent

by in Lockport, NY on February 23, 2010
3 answers
ANSWER by on February 24, 2010
Could be the master cylinder failing but usually this is what happens when the brake pads are worn out as the caliper is trying to stop the vehicle with very little friction material left, this happened on my Durango even though I new it had new pads my wife worn them out in under 10,000 miles
ANSWER by on June 19, 2010
I also experienced this and found that it was the speed sensor.
ANSWER by on October 21, 2010
just had simialr prob on mine had 2 put new bearings in front with sensors was causing the breaks to not work right cost about 650 to fix that included labor

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