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.

[grubsster]

I read everything you did again. If you are getting fluid coming out the wheel cylinders when you bleed them then, I'm unsure what could be happening. When I replaced the wheel cylinders on my 66 I bought the Delco replacement. I do have disk/drum. If you have a helper available, maybe remove one of the drums and have your helper push the brake pedal a small amount to see if you have movement. Not enough to pop the cylinders apart but just to see them move. If they don't move then check your master and proportioning valve. I can see why you are stumped.

[Gumby83]

appreciate the help, i am going to order new drums and see if that fixes the issue.