A screaming noise from the drive shaft of a car.Although the abnormal noise can not be heard at any time, but when the car shifts reverse gear or forward gear, it will repeatedly make a light knocking sound.

　　Solution: The common cause of abnormal noise of the drive shaft is a bad universal joint.When the universal joint is worn out, it will make a scream.The screaming noise is caused by poor lubrication of the universal joint cross shaft bearing.Remove the drive shaft and check the universal joint. When the universal joint is moving, check to see if there is any abnormal impact or looseness. If necessary, replace the universal joint.

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