I have a 1980 Trans Am Pace Car that has 4 wheel disc brakes that I'm having some issues with grabbing/dragging after driving it for a while. When it first started happening, I found that the master cylinder was leaking so assumed that was the issue. Replaced that and it is still happening. Both front and rear calipers are original, I took everything apart and cleaned everything up, so I don't think they are the issue.
I have ordered the rear single and both front rubber brake lines that I'll replace next but found this thread trying to figure out what is going on so I thought I'd post and see if @Joe37 ever figured out his issue?
I have the tool to hold the proportioning valve in the middle now but am wondering if maybe I should rebuild, just clean up or replace mine if the rubber brake lines are not the issue.
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