The main symptoms of the car cage failure are: abnormal sound or jamming during operation. There are two kinds of ball cages for cars: inside and outside. You can feel the space inside when you shake the cage with your hand. Generally speaking, the gap between the cages is very small. If the gap between the cages is very large, it means that it has been badly worn and must be replaced. The inner cage is connected to the differential part of the gearbox, while the outer cage is connected to the wheel part. Whether the power output or steering is completed by the outer cage. The automobile ball