Question about 2006 Ford F-250 Super Duty

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Brakes locking i have a 2006 ford f250 i traded a friend of mine for a lift kit in his truck we installed the nlift kit and a trailer brake system that was in his truck we noticed that the master cylinders were different one on his truck had a extra sensor in the bottom of the master we switched masters from one truck to the other his truck is ok no problems my truck the brakes lock up on there own you can drive one mile and they will do or 3 miles and it will do it my question is does the computer have to be flashed to eccept the trailer brake system also when it does lock up i open the brake lines on the master let the fluid release then close them and it releases

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  • gerry bissi May 11, 2010

    did you try disconnecting that extra sensor and test drive it?



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  • Ford Master
  • 2,607 Answers

Master cylinder fault,to brake pedal make sure there is freeplay at the master cylinder to brake peddle rod, if that is ok the bucket in the master cylinder is swollen and covering the oil return port. fit a new kit.

Posted on May 03, 2017


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Posted on Jan 02, 2017

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SOURCE: 1976 ford f100 pickup 2wd

The brake bias valve can cause your symptom.Are the outer part of the brake calipers able to slide in and out freely .Jack it up take a wheel off and get someone to push on the brake pedal while you check for correct movement.Lube the slides so it is easier for calipers to return.a chunck of 4x2 wood is useful if you find them too hard to move by hand

Posted on Oct 09, 2008

  • 49 Answers

SOURCE: Brake issues.

OK! Front brakes not releases all the way; bad calipers or rotten insides on your flex lines (acting as a check valve holding some pressure). Rear- replace hardware and wheel cylinder,( make sure the smaller shoe is on the front halve of backing plate or it will catch and lockup.)

Posted on Nov 29, 2008

  • 99 Answers

SOURCE: front brakes locking up...

I have a couple ideas for you. first make sure you bled out all 4 wheels making sure to get the air out. also check your abs module and see if it has a bleeder screw on it and bleed it. The second thing is after you drive it, does it seem like the brakes don't release after braking? is it ok when it's rolling? you may have a collapsed brake hose from your body to the calipers, allowing pressure through, but not back. This also makes sense after a few miles, when your brakes are just getting warmed up. after it starts locking up, jack it up and see if the wheel will spin. then see if the caliper piston will go back in. if it doesn't want to go in as easily as it should, or not at all, open the bleeder and see if it goes back. if it does, there's your problem, the hoses.
good luck!

Posted on Dec 14, 2008

  • 409 Answers

SOURCE: 1992 Ford F350 Dually Diesel Truck Brake System problem.

Adjust your rear brake shoes. Then rebleed the system. Start at the master cylinder Bleed master first then the wheel furthest away from the master (right rear then left rear then right front then left front. Do that and your pedal should be good.

Posted on Dec 30, 2008

  • 25 Answers

SOURCE: anti-lock & brake lights are staying on


Posted on Sep 28, 2009

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1 Answer

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