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Old 05-06-2019, 10:09 AM   #1 (permalink)
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TJ combo brake block

Hopefully this is a relatively simple question:

I am finishing up a TJ axle swap / stretch and am ready to plumb the front brakes.

For the rear, there is a single line running to a tee at the rear axle.

For the front, from the factory, Jeep ran individual hard lines and a long flex hose to the calipers.

Is there any reason NOT to redo the front the same way as the rear? So run one hard line down the upper link, to a tee, and split to each caliper with a flex hose?

If I do this, what should I do about the combo block under the MC?

Can I simply plug one of the two ports that used to service the front axle?

I would imagine that it is a simple Tee fitting from the MC.
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Old 05-06-2019, 01:25 PM   #2 (permalink)
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I run a tee from the front brake circuit on the MC to each frame side and soft lines down to wheel. Don't see why you couldn't do it the same as the rear.
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Old 05-06-2019, 06:52 PM   #3 (permalink)
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I just got mine driveable this weekend, so very limited experience. That said, I just removed the block completely, plumbed the front outlet on the MC to the rear brakes with a Wilwood proportioning vavle and the rear outlet to the front with a single flex line down the upper link, to a tee on the axle and two more flex lines to the caliper. Still have to dial in the rear brake pressure, but it definitely stops.
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Old 05-08-2019, 10:30 AM   #4 (permalink)
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How do you handle the brake light switch (or whatever it is) then?

Mine has a sensor in the back of the block.

Otherwise this would be ideal
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Old 05-08-2019, 03:23 PM   #5 (permalink)
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Not sure what year TJ you have, but on my that "sensor" is only to tell you if your have low brake pressure, it does not have any other purpose. The actual sensor that operates the brake lights is attached to the brake pedal itself. The sensor at the MC is really only one wire that grounds out - it looks like 2 wires going in, but if you look at the sensor you'll see they are joined together. You can verify by looking at your wiring diagram.

Mine is laying there unplugged and my brake lights work fine and the brake warning light is not lit up. I do run the risk of not knowing if I have brakes, but the reality is that you know that as soon as you depress the pedal

Last edited by giles45shop; 05-08-2019 at 03:23 PM.
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