Proportioning valves for disk/drum

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Proportioning valves for disk/drum

Postby kcfeist » Fri Nov 22, 2013 11:57 am

My proportioning valve (less than a year old) is leaking. I have read that this is not all that uncommon for these pieces that all the vendors sell.

Is there a better part available, or should I roll the dice with another one of the same.

Is there any issue with running the front brakes direct, and using an adjustable proportioning valve on the rear. My brake warning light has never worked so this is not a concern.
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Re: Proportioning valves for disk/drum

Postby Justin » Fri Nov 22, 2013 1:54 pm

I'd contact whoever you bought the valve from about warrantying it. You can use a stock H-block with an adjustable prop valve on the rear circuit. I almost went this route.
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Re: Proportioning valves for disk/drum

Postby Viperwolf1 » Fri Nov 22, 2013 2:12 pm

I just use the H block without a prop valve at it works fine.
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Re: Proportioning valves for disk/drum

Postby Kinder » Fri Nov 22, 2013 4:09 pm

Most of the late 70's ford trucks have valves you can reuse on a bronco.
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Re: Proportioning valves for disk/drum

Postby Rox Crusher » Fri Nov 22, 2013 5:38 pm

Those after market ones are roughly the same shape but are prone to leaking.

Supposedly there is a little valve that can be replaced to stop the leak.

This is the OEM version for a Bronco.

http://classicbroncos.com/forums/showth ... p?t=232435

They can be had new for 400.

If you don't buy it, I will for a back up.
1977 Sport, 351w OBDII EFI motor, 4R70W auto, 4:88 gears, ARB lockers, 3.5" suspension, 33" tires.
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Re: Proportioning valves for disk/drum

Postby akaFrankCastle » Fri Nov 22, 2013 8:52 pm

Viperwolf1 wrote:I just use the H block without a prop valve at it works fine.


x2

Bought a prop valve when I was in the middle of my disk install and never got around to putting it in. Still in a bag somewhere, never opened.
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1972 Sport uncut, 302, C4 with 1974 column , T shift Dana 20, 3.50 gears w/ limited slip, 1966 U13 Roadster kick panel, and factory power steering.

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Re: Proportioning valves for disk/drum

Postby kcfeist » Fri Dec 20, 2013 5:08 pm

Thanks for the advise, I was quite frustrated.
I put the stock H block back in and it seems to work fine in all the conditions I have tested .
If in the future I decide I want a proportioning valve, I will get the willwood adjustable one.
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