727 Time to rebuild

fishy68 said
By the look of it the seals were functioning properly since it pushed the piston out good with low air pressure. Probably leaking past the reaction shaft sealing rings. Just looked back and saw where you said the drum had some wear there. I can't tell much in the picture but it might be bad enough to cause a problem

Thanks I got it 90% back together, I will have to see what happens when it’s back in the car. Final end play is at .042” just have the accumulator, rear servo, and valve body left.