| | 70 mustang soft brake pedal
Have a 70 Mach. Pwr disc frt, drum rear. Soft brake pedal. Bleed system. Then changed master cyl.(bench bleed), bleed system-still soft. Changed vac power booster, and bleed-still soft. Changed proportional valve, bleed with 25# system bleeder-still soft. Fluid comes out when bleeding no air. Lines are not kinked. When pedal held-all four wheels will not turn. No fluid leaks. Adjusted/readjusted rear drums. Have done many brakes systems. Never experienced this issue.