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Proportioning Valve Routing Plumbing Help

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farna View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote farna Quote  Post ReplyReply Direct Link To This Post Posted: Mar/16/2017 at 7:36am
The first photo is a combination valve (pressure differential switch and proportioning). The proportioning valve is under the nut on the right. Older drum brake cars didn't have that nut on the side. Some combination valves (mid 70s) also have a metering valve. Metering valve combos have both front brake lines on the valve instead of one in a T between the combo valve and master (usually the left front off the T).

65-66 disc brake cars don't use a proportioning or combo valve, simple switch block like drum brake cars. They used non-servo rear brakes to reduce rear brake pressure/lock-up.

67-70 disc brake cars used the same switch block as drum brakes with a proportioning valve in the rear brake line, bolted to the rear sill near where it kicks up over the rear axle. I could be off a year here, going by memory... might be 68-70, with 67 using non-servo like 65-66.

71+ cars used a combo valve. 71-74 or so used one with metering, later eliminated the metering valve.
Frank Swygert
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rebel-misfit View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote rebel-misfit Quote  Post ReplyReply Direct Link To This Post Posted: Mar/16/2017 at 12:42pm
Cool. Okay, here's what I'm doing. I have a '75 Gremlin that I'm completely redoing the entire braking system. I purchased the car with no rear end, no brake lines. The braking system was completely gutted other than the front drums and master cylinder. I have a '77 AMX Hornet as a donor, so I took the rear end, combination valve and complete disc brake set up off and put it on the Gremlin. I bought new brake lines and am going to finish running them real soon. I will also be using the power boaster from the Hornet. So, in other words, it's all '77 AMX Hornet breaking/suspension on a '75 Gremlin. (Also, if curious, the Hornet was too far gone to save;)
Three 1970 Javelins
1970 AMX
1970 Rebel
1975 Gremlin
1976 Gremlin
1972 Javelin
1974 Javelin
1977 AMX Hornet
1974 4 Door Matador
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Post Options Post Options   Thanks (0) Thanks(0)   Quote rebel-misfit Quote  Post ReplyReply Direct Link To This Post Posted: Mar/16/2017 at 12:46pm
The fist pic posted here is the one off my '77 AMX Hornet going on to my '75 Gremlin.
Three 1970 Javelins
1970 AMX
1970 Rebel
1975 Gremlin
1976 Gremlin
1972 Javelin
1974 Javelin
1977 AMX Hornet
1974 4 Door Matador
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