need help

[rmmk14]

ok i have replaced the vacuum booster, the master cylinder, the wheel cylinders, and have bled the brakes 5 times but still have little brake pedal, what else could it be?

 

[Bronc76]

How are the rear shoes? The automatic adjusters may not be working causing excessive clearance.

 

[rmmk14]

the shoes are brand new too. the only thing i havnt replaced was the proportioning valve. would that be the problem?

 

[demon]

is it running rough? this is a common problem i have noticed, and mine is the same way. i have to change my modulator. apparently when it goes bad the truck looses mad vacuum and also starts to gag when in gear. Also blows white-ish smoke because tranny fluid gets into the motor