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What is the purpose of transmission fluid? When to change? These tips owners must understand!

Time：

2021-11-12

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Depending on the type of transmission, transmission fluid can be divided into two types, one is manual transmission fluid and the other is automatic transmission fluid.

Generally speaking, transmission oil has three roles, the first role is heat dissipation, the mutual friction between the gears to do work, will inevitably generate a lot of heat, this time need lubricating oil for heat dissipation. The second role is lubrication, to reduce the wear between the gears, so that the gears combined more smoothly. The third role is cleaning, keeping the shifting system clean and extending the life of the transmission.

When we change the transmission fluid depends on the model, different models have different requirements. Many vehicles' manuals clearly indicate that the transmission fluid should be changed frequently, but of course some models' manuals also state that it is maintenance-free for life, so it is important to judge whether it should be changed according to the actual situation.

Usually, automatic transmission fluid is generally recommended to be changed once around 40,000 kilometers, and owners can judge whether to replace it according to their actual situation with the car.

If the car shifts very smoothly and the transmission noise does not change much, it can be replaced. If the vehicle shifts gears and feels an obvious feeling of astringency or frustration, especially after driving over a hundred kilometers per hour, the transmission noise increases significantly, it is time to consider whether to replace the transmission oil. In addition, you should always check whether the automatic transmission fluid level is normal.

As for manual transmission fluid, because the internal structure of the transmission is relatively simple, and the precision is not high, the technology is relatively mature, so the mileage of manual transmission fluid replacement can be increased appropriately. The manual transmission fluid mainly plays a lubricating role, and is generally replaced once every three years or about 100,000 kilometers in a family car.

If the transmission oil is not replaced for a long time, the wear of the transmission gears is bound to increase rapidly, which can seriously cause the transmission to be scrapped in advance. Therefore, we must do a good job to replace the transmission fluid in a timely manner.

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