82 733 MAKES A HISSING SOUND WHEN THE BREAKS ARE APPLIED. SOUNDS LIKE THE AIR IS COMING FROM THE PEDAL. BRAKES WORK ARE VERY HARD AND FIRM. PRESS THEM AND THEY ARE HARD/FIRM PEDAL BUT IF YOU KEEP PUSHING ON THEM THEY GRADUALLLLI SINK TO THE FLOOR UNDER HEAVY RESISTANCE. IS IT THE BALLL LEAKING
AND THE MPG GAUGE IN THE TACH WORKS AND DOES'NT. ANYTHING THAT CAN BE DONE TO FIX. TIA