DID A COMPLETE REAR BRAKE JOB, ROTORS ,CALIPERS, PADS BOTH R&L. TRUCK SEEMED FINE AT FIRST TEST DRIVE THEN PEDAL GOT SPONGY, REBLED BOTH SIDE, SOLID STREAM NO AIR. AS SON WAS PUMPING BRAKES I CAN HEAR AN NOISE LIKE A RUSHING SOUND COMING FROM ABOVE THE GAS TANK AREA. NO FLUID LOSS. ANY IDEAS?