CONSUMER IS CONCERNED ABOUT THE WAY FREIGHTLINER HAS THE BRAKES SET UP WHEN BOBTAILING IN THEIR TRACTORS, WHEN TRYING TO STOP AND THE BRAKES ARE BEING APPLIED, NOTHING HAPPENS EVEN WHEN PUSHING HARDER, THE WHEELS THEN LOCK UP RESULTING IN A SKID, CONSUMER STATES THAT MANUFACTURER DESIGNED BRAKES NOT TO SKID WHEN BRAKES ARE APPLIED, HOWEVER THE TRUCK DOESNOT STOP, CONSUMER HAS LEARNED THAT THE GLAD-HANDS HANGARS ON THE BACK OF THE TRACTORS HAVE PIN HOLES IN THE CENTER OF THEM, THIS IS DESIGNED SO THAT THE AIR LINES CAN NOT BE BLOCKED OFF, CONSUMER LEARNED THAT IN FACT IF THE AIR LINES ARE BLOCKED THE BRAKES WORK PERFECTLY, HOWEVER CONSUMER WAS INFORMED BY FREIGHTLINER THAT BRAKES ARE OPERATING PROPERLY AND THEY COULD NOT CONDONE THE MODIFYING OF THE BRAKE SYSTEM.*JB