post #1 of Old 03-27-2008, 08:04 PM Thread Starter
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Location: Iowa
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4 port combination brake valve question

I'm new to jeeps and was noticing the combination brake valve on a '85 beside the MC had 4 outgoing ports (I'm used to only 3) Why are there two lines going to the rear instead of one?

Does this not have proportioning built inside? Could that 4th port (I assume the larger 5/16 or bigger one just be plugged off?

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post #2 of Old 03-28-2008, 01:05 AM
Pete M
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The bottom one that goes to the rear is the one that should be plugged.
Check out the diagrams in this post:
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-88 MJ; 4.0L, ex-2wd, TJ ax15/231, 78 Ford D44 w/spool, 9" w/posi, 33" trXus MTs, custom roll-bar/bumpers/etc.
Also an 86 MJ Metric ton and 2 '90 MJs
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post #3 of Old 03-28-2008, 09:11 AM Thread Starter
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Thanks! That's just the picture and thread I've been looking for
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