A cracked transmission cooler line that leaks directly over the exhaust manifold will cause the car to catch on fire while your girlfriend is driving the car. AND, the fire will cause the brakes to fail allowing the car to crash into the corner of the gargage where your brand new car is parked. And, since the car is totally on fire, you can't move it away from the garage, which has your new car in it.....Thank God the fire department is only a mile away.....