After installing this Brake Booster and Master Cylinder, 50-1098, the part never worked properly. When I applied the brakes, the air booster never relieved the brakes causing the car to stop. After 7-10 seconds he let go. Parking the truck would reduce the release time, but no pressure on the brake pedal could release it. This usually only happens in cold weather. After trying to contact Cardone and getting an apology, they finally told me they were not responsible for the part because I bought