I'm having issues with the brakes having a Hard Brake Pedal while baking up. I have read every thread I could find about this subject and as a a result changed out my vacuum pump, brake vacuum lines, replaced the crank shaft seal and did the PVC upgrade. I was also having issues with a hard brake pedal when coming off cruse control climbing hills at 70mph. Now at least I have improved the vacuum situation that is no longer a problem. However the hard brake pedal while backing persist. Can someone provide a link to any discussion that would lead me to more troubleshooting this issue? Thanks in advance.