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73-87 Chevy _ GMC Trucks => Brakes, Frame, Steering & Suspension => Brakes and Braking Systems => Topic started by: JohnnyPopper on August 31, 2019, 05:48:47 PM

Title: Mystery Brake Linkage
Post by: JohnnyPopper on August 31, 2019, 05:48:47 PM
So I'm under the C-30 and see a device that the rear brake line goes into before it splits to the two wheels.

It has a cylindrical body where a lever is attached at the center.

The lever is then connected to 90 degree arm that is fixed on the body of the axle.

I can only figure that it reacts to the rear axle flexing upon a heavy brake.

But what does it do?

It doesn't look sophisticated enough to be an anti lock system, but I could be wrong.

Any ideas? Thanks!
Title: Re: Mystery Brake Linkage
Post by: bd on August 31, 2019, 06:11:15 PM
Scroll down to Reply #3, Height Sensing Proportioning Valve (http://forum.73-87chevytrucks.com/smforum/index.php?topic=16967.msg133292#msg133292).
Title: Re: Mystery Brake Linkage
Post by: JohnnyPopper on September 01, 2019, 12:47:59 PM
BD you're the man!

And thanks to VZ for putting that together!
Title: Re: Mystery Brake Linkage
Post by: roundhouse on September 03, 2019, 07:53:25 AM
Primitive anti lock

Iíve bypassed em in just about every vehicle cause they never work right