rear brakes locking up
I have a 1984 C10 and have been dealing with the rear brakes locking up. I thought I had it fixed because I have been driving it for a couple months with no problem, but the other day I had to hit the brake hard and the right rear locked. I have changed shoes, both rear wheel cylinders, had both drums turned twice, new master cylinder, flushed the lines and adjusted and re-adjusted the brakes and it will still lock up.
I don't know what to look for as far has wear on the shoes, is there some wear pattern that will give me and idea of what is wrong?
Thanks for the help,