FYI FORD - MustangSteve's Ford Mustang Forum
The Internet's Most Knowledgeable Classic Mustang Information
IF YOU HAVE A QUESTION ABOUT CLASSIC FORD MUSTANGS, YOU HAVE COME TO THE RIGHT PLACE!
MustangSteve has over 30 years of Mustang experience, having owned 30 of them and restored several others. With the help of other Mustangers, this site is dedicated to helping anyone wanting to restore or modify their Mustang.... THERE ARE NO DUMB QUESTIONS!!!!!
Visit MustangSteve's web site to view some of my work and find details for:
FYIFORD Contributors' PICTURES - Power Brake Retrofit Kits for 65-66 Stangs - Classic Mustang FAQ's by MustangSteve - How to wire in a Duraspark Ignition - Mustang Ride Height Pictures and Descriptions - Steel Bushings to fit Granada Spindles to Mustang Tie Rods - Visit my EBAY store MustangSteve Performance - How to Install Granada Disc Brakes MustangSteve's Disc Brake Swap Page - FYIFORD Acronyms for guide to all the acronyms used on this page - FYIFORD Important information and upcoming events

You are not logged in. Would you like to login or register?

  • Index
  •  » FYI Ford, Classic Mustang Tech Discussion
  •  » 66 FORD MUSTANG 289 AUTO POWER STEER

    • 1 of 1

       

    12/29/2015 2:54 AM  #1

    kenbr
    Unregistered

    66 FORD MUSTANG 289 AUTO POWER STEER

    I have a 66 that when i drive for a while the pedal goes rock hard and the brakes go on without touching the pedal. the car was sitting for eight months and the brakes had somehow locked on.  i tapped all the drums and they came free but after driving it for about 15 kilometres the pedal became rock solid and the brakes locked on.  after the car sat for some time it seemed okay again.  can someone advise me what would cause this and how i can fix it.
     

     

    12/29/2015 7:16 AM  #2

    at
    FYI Addict

    Offline

    From: Tampa FL
    Registered: 4/02/2013
    Posts: 275

    Re: 66 FORD MUSTANG 289 AUTO POWER STEER

    The only problem I've ever seen like that was the wrong fluid used in the master cyl.  Engine oil was used to top it off and caused all the rubber cups to expand. Brakes would work normal for a while, then wouldn't release.

    You can lead a horse to water, but you can't get him drunk
     

    12/29/2015 8:24 AM  #3

    Pablo
    FYI Addict

    Offline

    From: Georgetown, Texas
    Registered: 4/12/2013
    Posts: 248

    Re: 66 FORD MUSTANG 289 AUTO POWER STEER

    Kenbr, I had that happen with my F-150 once.  The rod that goes from the booster diaphragm to the master cylinder piston came loose from the booster diaphragm.  When the engine made vacuum, it applied the brakes without any input from me.  When the engine was turned off and the vacuum bled out of the booster, the brakes released.  Until now, that is the only time I've seen this happen.
    Good Luck

     

     

    1 of 1

  • Index
  •  » FYI Ford, Classic Mustang Tech Discussion
  •  »  66 FORD MUSTANG 289 AUTO POWER STEER

    • Board footera


    REMEMBER!!! When posting a question about your Mustang or other Ford on this forum, BE SURE to tell us what it is, what year, engine, etc so we have enough information to go on.