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Brake prop valve

Discussion in 'The Garage' started by cegusman, Feb 14, 2003.

  1. cegusman

    cegusman 3/4 ton status

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    Is the prop valve from a 1ton the same as one for a 1/2ton?

    If they are different what is the difference?

    I am getting ready to do rear disks, would it be a good idea to get this 4 wheel disk prop valve
     
  2. Triaged

    Triaged 1/2 ton status

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    That might be a nice clean way to do it but I would rather gut the stock prop valve and use a adjustable prop valve in the rear line...too rich for my blood.
     
  3. cegusman

    cegusman 3/4 ton status

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    My stock one is so badly rusted, the brake lines will not come off. Plus it has a hairline crack that leaks"so no rear brakes. So I have to replace it, would it be better to just get a 1ton one disc/drum and a adjustable prop valve, or just get the one stated above disc/disc?
     
  4. cegusman

    cegusman 3/4 ton status

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    On more thing it will cost either $99 for the disc/disc prop valve or $150 for the disc/drum prop valve plus the adjustible prop valve.
     
  5. m j

    m j 1/2 ton status

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    seems like you answered your own question. $ for $
    the difficulty with an adjustible prop valve is how do you adjust it.
    if you set it up for wet weather/winter braking it will be rear biased in the dry(rears will lock due to greater wieght transfer in dry)
    and vice versa.

    I would get the 4 disc one as you are needing a replacement.
    I would shop around a GM parts counter to see if the price you have is a fair deal.

    did you search the forum for the many good previous prop valve threads
     
  6. TX Mudder

    TX Mudder 1/2 ton status

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    I'd like to know how it works for you if you go with that $99 prop valve. I've looked at that several times and have wanted to buy it, but I don't know how good the valving is for a truck... Might still need a Wilwood prop valve inline with the rears.
    -- Mike
     
  7. cegusman

    cegusman 3/4 ton status

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    I went ahead and ordered the disc/disc prop valve, I will let everyone know how it works. Truck just may be down for another 2 nonths.
     
  8. chulisohombre

    chulisohombre 1/2 ton status

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    definitely let us know because i will be running the stock one to see how it runs before i replace it.has anybody ever used a cadilac proportioning valve for the dual disk setup it has?just a thought if it fits correct.it would be a bolt on gm part then if it is the same size as the blazer.maybe i'll be the test pig and go see if it works. /forums/images/graemlins/deal.gif
     

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