Need a proportioning valve - Off-Road Forums & Discussion Groups
Jeep-Short Wheelbase All discussion of short wheelbase Jeeps: CJ, TJ, YJ and JK

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post #1 of (permalink) Old 05-05-2009, 06:58 PM Thread Starter
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Need a proportioning valve

Anybody know where to get a combination (proportioning) valve for my '78? I found one at 4wd.com, Brake Proportioning Valve and Other Jeep Parts and Jeep Accessories by 4 Wheel Drive Hardware, but they want $99.99 for it! Mine is leaking between the rear outlet port and the main body. For a C-note I'll R&R the thing and try to stop the leak.

ComboValve.jpg

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Last edited by Jim_Lou; 05-05-2009 at 07:09 PM.
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post #2 of (permalink) Old 05-05-2009, 07:28 PM
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Pirate Jack is the cheapest I have seen for stock type combination valves, about $60. I have never bought from them but they have a nice web page with good trouble shooting stuff. However, they seem to only deal in car stuff so I am not sure the proportioning would be correct for a rig with a higher center of gravity.

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post #3 of (permalink) Old 05-05-2009, 07:47 PM
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I should have the stock one out of my '95 laying around if you're interested Jim Lou. I would think they would be similar. (Disc front, drum rear) Might take some different fittings, no biggie. I could bring it with me to the Bash or send it with Tater if I don't make it.

Ooohhh... YJ parts in your CJ, that would be sweet!!!

Let me know.

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post #4 of (permalink) Old 05-05-2009, 08:00 PM Thread Starter
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I think that I'll take it off and see if I can stop the leak. It might just need a new O-ring. If I can't fix it I'll make a new plan, but I'm not going to spend $60 without taking a run at fixing it. Anybody ever take that end piece off to see what's in there? The FSM says the unit is not repairable, but I've never let that stop me.

Aaron, I wouldn't let just any YJ parts into my CJ, but would be honored to have a Crazy Eddie part. But the 4WD web page lists the application as 1977-78 and 1982-86 CJ, so it might not work. I would spend the money before I boogered up the lines or built a science fair project of fittings.

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post #5 of (permalink) Old 05-05-2009, 08:07 PM
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I have one off the 79 frame. As far as I know it is in working condition. At least I know it didn't leak.

PM me your address if you want it. You can pay me back the shipping at the bash.

Is this the only hammer you've got?
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post #6 of (permalink) Old 05-05-2009, 08:15 PM Thread Starter
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The '79 valve might be different. Does it look like the one in the drawing? In '78 they used two types, the W like mine and the type D which is similar but different. In '79 to '81 they might have used only the type D, or something completely different. Why don't you send it over anyway and if I can't use it I'll give you the valve and the shipping at the Bash. My business address is:

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post #7 of (permalink) Old 05-05-2009, 11:07 PM
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It looks exactly the same and I think I see a stamp of a circle with a W in it next to a possible part number. It's boxed up and will be on the way in the morning.

Is this the only hammer you've got?
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post #8 of (permalink) Old 05-06-2009, 05:38 AM Thread Starter
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Super! Thanks! Please send a tracking number when you get it.

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Last edited by Jim_Lou; 05-06-2009 at 07:25 AM.
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post #9 of (permalink) Old 05-06-2009, 02:12 PM
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The one I used in my '79 was from a '83 or '84 Chevy S-10 pickup with V-6 engine.

Same size/kind with correct line sizes all the way around.
Cost was about $35 new.
----------------------------------

The combo valve is easy to clean and reuse, and it's usually rust/corrosion that keeps them from working like they should.

Clean them up, slap a new 'O' ring on them and go to town!
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post #10 of (permalink) Old 05-06-2009, 03:21 PM
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So, Jim, assuming the one you get works, are you gonna take the old one apart and slice the body in half on a band saw and show us what’s in there? It’s been a topic of discussion several times.

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