65 Chevy C10 rear drum brake woes. please help.

[Gumby83]

Originally Posted by grubsster

Did you "lock out" the proportioning valve when bleeding the brakes? Others on here can explain this better but, I used a cheap special made tool to bleed mine. It goes where the brake warning light would connect to the valve. Otherwise, I think the shuttle closes off the perceived failed half of the system. It looks like the one in the picture.

Good luck.

I don't know if i have a spot for that on my proportioning valve. i have one but it seemed way too big for mine. maybe i need a smaller one? i have an adjuster knob for bias. i've tried it every way i can. its almost like my wheel cylinders are too small and dont push the shoes out far enough or something.