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68gmsee · 05-30-2011, 09:12 AM

^ Correct.

Did you also replace the rear brake line hose?

If you have the drums and you're not getting fluid to the back brakes then either the part of the master cylinder that controls the rear is defective or you have a blockage to the rear brakes.

I'd start by loosening the connectors starting at the master cylinder while having someone apply the brakes to see if you have fluid there and work backwards. And if you replaced the master cylinder, new ones are not what they used to be.

05-30-2011, 09:12 AM	#6
68gmsee Active Member Join Date: Jul 2007 Location: Centrally located between Houston, Austin and Waco. BCS area. Posts: 7,947	Re: Resetting Proportioning Valve ^ Correct. Did you also replace the rear brake line hose? If you have the drums and you're not getting fluid to the back brakes then either the part of the master cylinder that controls the rear is defective or you have a blockage to the rear brakes. I'd start by loosening the connectors starting at the master cylinder while having someone apply the brakes to see if you have fluid there and work backwards. And if you replaced the master cylinder, new ones are not what they used to be.