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I need to replace the junction box where the brake line comes from the front and T's off to each wheel. Does it screw into the axle housing or is it pressed in? also is this also a pressure release for the axle? and where do I find one to replace it with?
 

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The way mine is.. is that it is screwed in, to hold the junction box into place, but hte "screw" itself is the tube which vents the housing.

You might want to look for a mid 80's for truck one, they are only $20. But you might have to run new lines to the calipers. Its all what youre doing,... if youre totally rebuilding then you can "Custom make it"... if not, then find an exact duplicate.

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Brake systems are basically "plumbing".. you have to get fluid to the rear somehow.. .. just keep the lines the same size and never use a compression fitting.
 

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That "T" is actually a fitting that comes with the hose that connects to the steel line leading to the front. The "T" connects to the lines leading to the individual wheels, and is held onto the differential with a special screw that has a riser on it for connecting the "breather" hose that terminates in the body. Clear as mud?

In other words, to get the "T" fitting, all you have to do is buy a new hose that it is an integral part of.
 

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What you are talking about is the junction block which is a fitting integral to the "flex hose" connecting at the intermediate steel brake line, running from the front distribution block in the engine compartment to just in front of, and above, the rear axle. The junction block has a hole in it - top to bottom. This hole (about 3/8ths) is used to mount the junction block to the rear axle tube. The tube has a threaded hole in it. You line up the junction block over this threaded hole (driver's side of car) then use the special Ford fitting. The fitting is actually a breather tube with a threaded end. The threaded side fits through the junction block and threads into the axle tube. The upstream end of the flex line runs up to the steel intermediate brake line. The two joint together at a bracket which is tack welded to the underside of the car. A clip is used to secure the flex hose into the bracket. First hand thread the flex line and steel line together with the fitting on the steel line. tighten with a line wrench, then slide the retainer clip over the bracket and around the end of the flex line, to hold it in place.

CAVEAT!!!! not all breather tubes and flex line/junction blocks are the same. There are two styles - single exhaust and dual exhaust. They are NOT interchangeable. The junction block is thicker, breather tube longer, on the dual exhuast. This positions the angle of the rear steel lines slightly different and also changes the length of each of these steel rear brake lines which run along the axle. If you use a single exhaust flex hose on a dual exhaust setup, the flex line is too close to the driver's side exhaust pipe and will burn/melt through, causing brake failure.

good luck.
 
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