If the engine is "Heart"", then,The gearbox can be said to be the "brain" of the car，is one of the important components of the car，When the car is driving for a certain time or after mileage，Auto gearbox oil needs to be replaced regularly。

Garway box oil can play a role in ensuring the normal operation of the gearbox and extend the life of the transmission device，Generally replace it every 5-80,000 kilometers，Specific car owners can query through the Ledong online maintenance manual。

There are many hydraulic valves and various small oil pipes in the inside of the gearbox，Compared to changing oil，It is more complicated to replace the gearbox oil。Replace the gearbox oilUsuallyThere are two ways: one is to change oil for gravity，Another is to use automatic circulating machine loop replacement，So what is the difference between the two ways to replace the automatic transmission oil? Which one is better?

Gravity changing oil is better understanding, that is, throughDispolactomy of the gearbox oil bottom oil screw，Let the gearbox exhaust oil flow out of seabet mygravity，Add new transmission oil。

However, traditional gravity changes oilUsually residual old gearbox oils are more oil，Especially for automatic transmission oil。This has a direct relationship with its internal complex design structure，Generally, at least 6-8L automatic transmission oil inside the common automatic transmission。Where，The valve body module liquid coupling occupies about 50%of the total oil，There are also some automatic transmission oil bottom shell design reasons, which will also occupy a part of the transmission oil。

If you want to further reduce the storage residual of the old oil，You can unscrew the screws around the oil bottom shell，Get the oil bottom shell，Clean the oil bottom shell。

Summary:

The advantages of gravity change:Simple operation and less oil, relatively save money.

Disadvantages of gravity exchange:Old oil storage is relatively large，After adding new oil, it will cause new and old oil to mix，Reduce the maintenance cycle of the gearbox。

Replace oil with a circular machineIt has only become popular in China in the past few years. In short, it isPush out of the oil inside the gearbox through the principle of "post -wave push forward waves"。

Usually screw the oil screws for oil (about 3L of old oil)，Then open the oil bottom shell screw and continue to release the old oil (release about 1L of old oil)，Perform cleaning oil bottom cases。

Putting a new automatic transmission filter after cleaning the bottom shell of the oil，After completing the replacement, install the oil bottom shell to connect the looper，Replace the automatic transmission oil，The vehicle needs to be activated during the recycling process of the circulating machine。At this time, the new Seabetoil is injected into an automatic transmission，Old oil is pushed out by pressure。

During the circular machine replacement process，You can clearly see the alternation of new and old oil through the window and window，until the color of the old oil is consistent。

Circular machines can generally replace more than 80%old oil，But it will spend more than 4-5LNew oil, the price of the two may be hundreds of to thousands of yuan.

Summary:

The advantages of loop replacement:Old gearbox oil residue is small，New oil is not serious for secondary pollution，Always allow the gearbox to work in a good working environment，Appropriate extended transmission oil maintenance cycle。

Disadvantages of loop replacement:The operation process is complicated, the amount of oil is large, and the price is more expensive.

From a technical perspective，Use a circular machine to replace the car gearbox oil than traditional gravity replacement，Make up for the shortcomings and deficiencies of gravity exchange.

Although the advantages of replacing the gearbox oil with the circulating machine are used，But generally only 4S shops are equipped with a circulating machine，Small roadside auto repair shops usually have no。If you feel that every time you change the oil, you must clean up，So you can use a circular machine，If it doesn't matter，So you can also use the traditional gravity method。

Source: car maintenance and maintenance

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