Automatically shift from third gear to fourth gear throttle ring.

First of all, when in neutral, the gearbox makes abnormal noise. Sometimes we will find that when it is in neutral, the gearbox will make abnormal noise, but when we step on the clutch, the abnormal noise will disappear. Usually, the bearings at the front and rear of the first shaft of the transmission are worn or loose, or the gears are often meshed. If you change to another gear, it may be because of the bearing behind the second axle ring. When the inner bearing of an automobile is found to be damaged or loose,