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Posted

87 Comanche.....

 

There is a Linkage rod from the Rear Diff Cover to a Vac can mounted on the frame rail......What the hell is that?

 

No matter what it is, its coming off.

 

~Ryan

Posted

Thats a payload brake proportional valve... more you weigh the truck down the more it pushes the rod up ,, the more it pushes the rod up the more brake line pressure it gives the rear brakes.!!

Posted

Try to make sure the swing arm up is tied up securely and remains about parallel with the ground. Otherwise you could lose your rear brakes.

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