72 Gremlin Prop Valve

Hi MOPAR,

Any chance you could look up application Years and Models for the 322 5664 valve for me please ?

I have a 322 5666 valve (like you) wondering if that is the p/n '5664 valve ?

Thank you,

Jerry

Both the early and late valves are called "combination valves" because they do several things -- distribute brake fluid, hold brake light pressure differential warning switch, and have a proportioning valve for the rear brakes. The one with five in/outs also has a metering function which holds off applying the front brakes until ~100 psi is built up so that the front and rear brakes apply at the same time (takes ~100 psi to overcome springs in drum brakes). That was only used a few years, then engineers realized the fraction of a second really didn't affect anything, so the metering function was dropped (not just at AMC). So you can use either valve and be perfectly safe.

The five in/out valve has two ins and three outs -- one for each front wheel and one for rear brakes. The four in/out eliminates one of the front brakes. The opposite front brake is fed from a T, before going into the combo valve. That way if either front caliper leaks it will throw the warning light switch (wouldn't if the T was after the combo valve).