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  1. A

    Rear Brakes Locking Up

    A) No idea. I replaced all the existing stuff with new parts the way the old stuff was assembled. B) The new stuff is stock replacement parts and looked just like the old stuff. I don't take wheel cylinders apart to verify size.
  2. A

    Rear Brakes Locking Up

    I have looked at these and I'm fine with it. I have some questions on the plumbing. Simply add this like you said with no other changes? I can leave the existing plumbing as is?
  3. A

    Rear Brakes Locking Up

    Yes.
  4. A

    Rear Brakes Locking Up

    Any idea where I can get a replacement one that is any good?
  5. A

    Rear Brakes Locking Up

    I think you're on to something there. Any suggestions for a reliable replacement?
  6. A

    Rear Brakes Locking Up

    OK, I did this procedure last night and took it for a test. The rears lock up and the fronts don't, just like before. Any other suggestions? I'm willing to go to an adjustable Wilwood proportioning valve and be done with this factory stuff.
  7. A

    Rear Brakes Locking Up

    I have checked them five times. Seriously, five times. Everything is "perfect".
  8. A

    Rear Brakes Locking Up

    https://images.app.goo.gl/SpjgiTZZe3QMTyXd7 This link will show you the exact master on my truck.
  9. A

    Rear Brakes Locking Up

    Thanks. I'll do this when my "assistant" gets home. LOL
  10. A

    Rear Brakes Locking Up

    When I do this should my assistant just simply push the pedal down as normal like we do when bleeding, or hit it fast, slow or otherwise? I'll try it this afternoon.
  11. A

    Rear Brakes Locking Up

    I tested by deliberately locking up the tires with a good strong foot on the pedal, putting it in park, and getting out to see the marks. Only the rears lock up, both of them. The fronts left no rubber on the pavement at all.
  12. A

    Rear Brakes Locking Up

    Thanks AuroraGirl. I want to experiment by switching the lines at the master. Do you think I can get adapters? If not, I'll have to make new lines, not a big deal if I can't avoid it.
  13. A

    Rear Brakes Locking Up

    Thanks Legopnumatic. I'ts aluminum with a plastic reservoir just like you describe.
  14. A

    Rear Brakes Locking Up

    Thanks DoubleDingo. I made all new steel lines for the truck and routed them the same way as it was when I got it. It might have been wrong all along. The guy I bought it from did alot of other questionable things to it.
  15. A

    Rear Brakes Locking Up

    Thanks Blue Ox. The diagram reminded me I bought the tool that temporarily replaces the warning switch for bleeding purposes. It screwed right in no problem, so I think the valve is centered. I also checked the warning switch with a powered test light and it doesn't light up.
  16. A

    Rear Brakes Locking Up

    OK. So you're saying concentrate on the proportioning valve. I'll try that.
  17. A

    Rear Brakes Locking Up

    OK. I'll try that. Thanks
  18. A

    Rear Brakes Locking Up

    Yes, I have my doubts about new valves too. The way you mention about re-centering the valve is how I bled the rear brakes. Wouldn't that essentially do the same thing?
  19. A

    Rear Brakes Locking Up

    I have the rear port of the master, the small line, feeding the front brakes, and the front port of the master feeding the rear brakes. Is that right or do I have it backwards?
  20. A

    Rear Brakes Locking Up

    I get fluid at all four corners when bleeding. I don't see how it could be the issue, but if it could be the problem can you please explain how?
  21. A

    Rear Brakes Locking Up

    I have a '86 half ton 2wd. It has the small brakes, 2" shoes in the back and 1" thick rotors in front, power assist. The rear brakes lock up with just moderate pedal pressure and the fronts don't lock up no matter how much pedal I give it. Also the rear drums make a hell of a noise as I come to...

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