Question about 1983 Jeep CJ7
Assuming you're talking about the brake system...
The proportioning valve is on the rear brakes only when the vehicle has rear Drum Brakes.
What it does is limits the brake line pressure to the rear brakes during normal stopping. This way the rear brakes don't lock up and cause the vehicle to fish tail or spin.
When you press the brakes harder than normal, the proportioning valve opens more to allow more line pressure so you're able to stop faster.
I’m happy to help further over the phone at https://www.6ya.com/expert/jason_00b31cc8f593773a
Posted on Jul 10, 2014
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