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Rear brakes are locked up after I press and release brake?

Tiny
NJB1979
  • MEMBER
  • 1994 MERCURY SABLE
  • 3.8L
  • V6
  • FWD
  • AUTOMATIC
  • 140,000 MILES
My rear disc brakes on my 1994 Mercury Sable lock up after I press and release brake pedal. They will slowly let go and can spin wheel again. I have replaced lines, and master cylinder and bled the brakes. Any clues?
Wednesday, January 21st, 2015 AT 4:14 PM

2 Replies

Tiny
CARADIODOC
  • MECHANIC
  • 33,908 POSTS
Which lines are you referring to? Did the problem continue occurring right after you replaced the master cylinder, or did the brakes release properly for a few days?
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Wednesday, January 21st, 2015 AT 5:20 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 48,289 POSTS
This happens when the brake master cylinder is going out and not returning fully which holds the brake on. Please go over this guide.

https://www.2carpros.com/articles/a-comprehensive-guide-to-fixing-automotive-brakes-locking-up

Please go over this guide and get back to us.
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Monday, October 7th, 2024 AT 6:52 PM

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