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05 F150 Brake Vibration

  • Creator
    Topic
  • #555580
    NathanielNathaniel
    Participant

      Going back to work from lunch i attempt to stop at a soon to be red light while going 30 mph brake pedal SINKS TO THE FLOOR! I coast work and use my e brake to stop.

      My master cylinder failed! I’ve had stuck calipers and a vibrating brake pedal for a while but never had money or time to get to them. Doing my inspection i notice that my calipers were never stuck just the slides where nearly dry. So I replaced my master cylinder, rotors, pads, and greased the slides(I couldn’t machine my rotors because they have the bearings built in) but at low speed i hear the my passenger side bearing squeaking.

      If i brake below 10 mph i feel my pedal pulsating slowly and if i do it at 60 the whole front end shakes.

      Do you have any other suggestions or answers for me?

      Thanks for your help!

    Viewing 6 replies - 1 through 6 (of 6 total)
    • Author
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    • #555616
      BillBill
      Participant

        Replace the rotors.

        #555673
        NathanielNathaniel
        Participant

          I already have replaced them and still pulsates.

          #555704
          college mancollege man
          Moderator
            #557105
            EricTheCarGuy 1EricTheCarGuy
            Keymaster

              You can still machine rotors that house bearings. That said if you replaced them they should be good. If not it may be that you purchased defective rotors or they were not installed correctly. Vibrations during braking are almost always related to warped rotors or drums.

              #557118
              BryanBryan
              Participant

                Sounds like warped rotors or drums. Did you replace the pads when you replaced the rotors? Did you also tackle the bearings? Pads with uneven wear on new rotors can do crazy things like noise, vibrations etc. The pulsating may also be air in the line. Check those also.

                #557122
                BryanBryan
                Participant

                  Also, dont use grease on caliper slide pins. Eric has a video which mentions that and he is right. A stickingccaliper may not be stuck yet but will still give some of the symptoms youve mentioned. Does it frequently pull to one side or the other during braking?

                Viewing 6 replies - 1 through 6 (of 6 total)
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