Passenger rear drum brake uneven pressure when braking

Tiny
F1501986
  • MEMBER
  • 1986 FORD F-150
  • 5.0L
  • V8
  • 2WD
  • MANUAL
  • 65,000 MILES
Replaced wheel cylinder assembly and other brake components and hard brake line (which had a hole) bled brakes so no air in line. What is causing uneven braking pressure?
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Wednesday, June 2nd, 2021 AT 9:03 AM

5 Replies

Tiny
ASEMASTER6371
  • EXPERT
Good morning,

This could be the master cylinder. The way the system works is the master cylinder sends pressure to the right front and left rear from one line. Then the other line goes to the left front and right rear.

https://www.2carpros.com/articles/how-to-replace-a-brake-master-cylinder

https://www.2carpros.com/articles/how-to-bleed-or-flush-a-car-brake-system

If you have unequal pressure, most likely it is the master cylinder.

Roy
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Wednesday, June 2nd, 2021 AT 9:33 AM
Tiny
F1501986
  • MEMBER
I understand that if its uneven from front to rear but the unevenness is only on one rear wheel, just the passenger rear. Driver rear is applying adequate force.
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Wednesday, June 2nd, 2021 AT 12:28 PM
Tiny
ASEMASTER6371
  • EXPERT
Okay, I understand. It still points to the master cylinder.

Roy
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Wednesday, June 2nd, 2021 AT 2:53 PM
Tiny
F1501986
  • MEMBER
Thanks for your assistance; I'll try a replacement and see how it goes!
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Thursday, June 3rd, 2021 AT 4:09 AM
Tiny
ASEMASTER6371
  • EXPERT
You are welcome.

Always glad to help.

Roy
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Thursday, June 3rd, 2021 AT 4:21 AM

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