Generally, the most obvious feature of the damage of the outer CV joint is that the car is normal when driving in a straight line, but when steering, the front wheel part gives out a "click" sound, which is unable to turn seriously; The most obvious feature of the damage of the cv joint is when the car is accelerating or driving on the uneven road surface, it will issue "ka-ka" abnormal sound in the gearbox part, while accompanied by the phenomenon of the oil leakage, if the damage is serious when the car turns, there will be abnormal sound.