proportioning valve?

Author Topic: proportioning valve?  (Read 915 times)

Offline Beck

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proportioning valve?
« on: December 23, 2008 - 01:46:22 PM »
hey guys i got a quick question,
would my 73 barracuda have an adjustable proportioning valve?
my rear drums are locking up too easily under braking
cheers,
aaron




Offline thedodgeboys

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Re: proportioning valve?
« Reply #1 on: December 23, 2008 - 02:04:55 PM »
Not from the factory Aaron

Could be the ajusters are too tight on the rear  :dunno:

A leaky wheel cylinder maybe  :clueless:

Did it just start doing that?
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Offline Changin Gears

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Re: proportioning valve?
« Reply #2 on: December 23, 2008 - 02:19:23 PM »
They all do that stock.  2 different fixes 1) put an adjustable valve in the rear line or 2) replace the rear wheel cylinders with ones that have smaller diameter pistons (mid '70's half ton truck).  Sometimes need both.


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Offline Beck

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Re: proportioning valve?
« Reply #3 on: December 23, 2008 - 02:29:50 PM »
it's done it to some degree the whole time i've had the car, but more apparent since i just did some brake work (new hoses, lines, master cyl etc.   the old master cylinder was faulty, not generating pressure to the rear circuit).
how do you adjust out the drums? could this solve the problem of the drums grabbing too hard? at least untill i can get a proportioning valve into the rear line
« Last Edit: December 23, 2008 - 02:32:33 PM by aaron beck »

Offline Chryco Psycho

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Re: proportioning valve?
« Reply #4 on: December 23, 2008 - 03:44:58 PM »
adusting the brakes shoes makes no difference other than the pedal goes lower before the brakes work , you need to install a different / adjustable valve

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Offline Beck

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Re: proportioning valve?
« Reply #5 on: December 23, 2008 - 05:03:20 PM »
ok, i've ordered a wilwood adjustable proportioning valve from a brake shop.
cheers guys