Question about 1983 Jeep CJ7

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What does the proportioning valve do? - 1983 Jeep CJ7

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Assuming you're talking about the brake system...
The proportioning valve is on the rear brakes only when the vehicle has rear Drum Brakes.
What it does is limits the brake line pressure to the rear brakes during normal stopping. This way the rear brakes don't lock up and cause the vehicle to fish tail or spin.
When you press the brakes harder than normal, the proportioning valve opens more to allow more line pressure so you're able to stop faster.

I’m happy to help further over the phone at https://www.6ya.com/expert/jason_00b31cc8f593773a

Posted on Jul 10, 2014

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1 Answer

I have brake fluid leaking, when i press the brakes, out of the bottom of what i think is the height sensing proportioning valve


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Rear brakes lock when press brake pedal.


get is serviced.

its stuck in , low bed (loaded) mode. the lever is or parts in side

stuck in full load mode.

and guess what, if you bypass the valve, what will happen

the rear brake will lock, going fast and if on wet or worse roads. 10x worse. its there for a reason. to lower the brake pressure with no pickup bed load. or not heavy trailer tongue weight.



ever consider the rear brakes are bad. first. and not the valve.



service the rear shoes and slaves.

then check the bypass.



Does the truck still have the height sensing brake line bracket and line connected into the prop valve?



http://www.jeepforum.com/forum/f53/bad-proportioning-valve-any-ideas-1127468/#post10505224







here is the valve.

sold at , JEEP.



http://www.factorychryslerparts.com/products/JEEP/1988/COMANCHE/VALVE--Proportioning--VALVE--Proportioning--ECE-198789--1989--Except-France--Italy--1990--KDX--KDX-After-3-1-93--KDX-Up-to-3-1-93/4520728/52009114.html



Chysler p/n

52009114 ; 52003118



google that and find them for $75

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CJ7 Proportioning Valve - 1983


http://www.bustedjeep.com/projects/yjbrakes.asp

Check out the last paragraph, re: which proportioning valve should I use?

It says that either will work, but the YJ valve is cheaper

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