# Car repair

**URL:** <https://community.cartalk.com/t/car-repair/49219>\
**Category:** Maintenance/Repairs\
**Tags:** thunderbird, ford\
**Created:** [May 22, 2010, 9:51pm UTC](https://community.cartalk.com/t/car-repair/49219 "2010-05-22T21:51:10Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![thundertang50](https://avatars.discourse-cdn.com/v4/letter/t/ee7513/32.png) [@thundertang50](https://community.cartalk.com/u/thundertang50)\
**Post date:** [May 22, 2010, 9:51pm UTC](https://community.cartalk.com/t/car-repair/49219/1 "2010-05-22T21:51:10Z")

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I have a 1985 thunderbird with a brake problem,After a few moments of operation the front brakes start to lock up. I have replaced both calipers,brake hoses,master cylinder,booster,and ran a vacuum line directly from the intake.I also replaced pads and rotors. I am at a loss to what may be causing the problem.

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**Author:** ![Joseph\_E\_Meehan](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/joseph_e_meehan/32/21_2.png) [@Joseph\_E\_Meehan](https://community.cartalk.com/u/Joseph_E_Meehan)\
**Post date:** [May 22, 2010, 9:56pm UTC](https://community.cartalk.com/t/car-repair/49219/2 "2010-05-22T21:56:41Z")

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I seem to remember that many cars of that age had a valve used to balance pressure. Do you know if you have such an animal?