Automatic transmission models are easy to operate, so their market share is increasing. However, the maintenance frequency and cost of automatic transmission are also increasing. Most car owners don't know how to properly maintain and maintain the automatic transmission. Often when maintenance is needed, the maintenance cost of the original gearbox is much higher than that of the engine. Therefore, we suggest that you have a correct understanding of the maintenance of automatic transmission as soon as possible to reduce the maintenance cost in this respect.

1. Automatic transmission oil can be mixed.

Different types of automatic transmission oils cannot be mixed, because the flow rate, density, friction coefficient and expansion coefficient of different types of transmission oils are different. According to the characteristics of automatic transmission, manufacturers introduce matching transmission oil products. It is recommended that car owners buy corresponding oil products for replacement, and do not replace other models without authorization.

2.ATF can replace CVT transmission oil.

CVT transmission oil is similar to at oil in nature, but belongs to special oil. Because CVT transmission adopts special steel belt transmission and needs different parameters such as oil flow, friction coefficient and expansion coefficient, AT series transmission oil cannot be used instead. Relatively speaking, it is thinner than AT automatic transmission oil. In addition, it also has a certain damping friction to prevent the transmission chain from slipping.

3. Does the automatic transmission oil need to be changed?

Many 4S stores will attract customers with the slogan of life-long maintenance-free gearbox! Due to the damage of automatic transmission, many rescue incidents occurred. In many maintenance cases, the friction plate in the automatic transmission of the faulty vehicle is severely ablated and stuck, resulting in the vehicle being unable to run. The main reason for the failure is that the automatic transmission is seriously short of oil or the automatic transmission oil is deteriorated. Many car owners have not developed the awareness and habit of changing automatic transmission oil. There are also some faults, such as replacing inferior oil, and the automatic transmission has just changed the oil without changing the oil according to the model, which leads to the damage of the automatic transmission.

Bian Xiao believes that it is not difficult to repair the automatic transmission! It is wise to advocate "repairing without repairing" at present! In the maintenance of automatic transmission, the selection, inspection and replacement of transmission oil are the most important tasks. From the practice of repairing automatic transmission, it is found that more than 80% of the faults of automatic transmission are caused by the deterioration of automatic transmission oil. Checking and replacing the oil of the automatic transmission is actually maintaining the automatic transmission, which can effectively prolong the service life of the automatic transmission.

4. Wait until the oil deteriorates before replacing it.

Wait until the oil deteriorates before replacing it? I'm afraid the whole automatic gear will be changed then! The change cycle of automatic transmission oil depends on the mileage or service time. If two indicators are given in the vehicle manual, the first-come-first-served indicator will be used. If the oil change time is not specified in the vehicle manual, it is generally replaced according to the mileage of 40,000-60,000 kilometers. However, if the automatic gearbox has been repaired, the oil change time will be greatly shortened, and it is generally recommended to be 20,000 kilometers or 1 year.

5. Manual oil change is to change the automatic transmission oil for the owner.

There are generally two ways to change the oil in gearbox, one is the traditional gravity manual oil change method, and the other is the machine circulation oil change method. At present, many repair shops still use the traditional manual oil change method to change oil. This manual oil change method is to open the oil drain screw of the automatic transmission and let the oil in it drain naturally under the action of gravity. Although the operation is convenient and the time is short, the oil change is not thorough enough, and only one quarter to one third of the old oil can be changed. At present, quite a few repair shops are still using this oil change method. Due to the mixing of old and new oil after refueling, the oil in the automatic transmission is still in an impure state, and the oil change effect is not ideal.

In contrast, the whole process of this method takes a long time. If the oil in the gearbox is changed dynamically through machine circulation and professional equipment, it takes about one hour. Its advantages are thorough oil change, more than 90% old oil can be replaced, and sludge and metal chips in automatic transmission can be cleaned. Through machine circulation, the oil change cycle can reach 40,000-60,000 kilometers. Therefore, it is best for the owner to know what it means to change the oil in the store before changing the oil.

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