Part Type: Brake Drum. 2x Dorman - First Stop Rear Drum Brake Wheel Cylinder For Ford Ranger 1983~1997. 4x Centric Parts Front Rear Drum Brake Wheel Cylinder For Ford Mustang 1964~1966. FAQs:A symptom of a low brake pedal is usually caused by air in the system, misadjusted brakes, worn brake pads, a deteriorated flexible brake hose or a misadjusted Master Cylinder push rod.