7-10 years: old age
　　Due to the limited life of the car, in our country, the car generally to 10 years to retire, if properly maintained, the car can be healthy to complete the mission on time. But after seven years, the car will gradually enter the old age. At this "age", those small parts replaced in the third year and the fourth year almost need to be replaced again, such as the shock absorber. In addition, most cars with automatic transmissions should also have their automatic transmissions serviced at this time.
　　Automatic transmission maintenance:
　　Use the owner of the car that changes speed automatically, the transmission structure of the car that changes speed automatically is more complex, more accurate also, when driving the car that changes speed automatically, want to run freely inside life period, maintain good condition, the owner must much intention, let different shift block use alternately, the maintenance that should do cannot save certainly. This will extend the life of the automatic transmission.
　　This paper is sorted out by dongguan oneness filtration technology co., LTD.