實際上很多人對汽車的知識還很薄弱，不懂合理保養的車主大有人在。這里就不乏出現一些公里數很大年限很高，沒換過變速箱油的車型。那么問題來了，老車真的不可以更換變速箱油嗎？它又究竟是怎么壞掉的呢？
山東變速箱維修人員為您講解一番。
In fact, many people's knowledge of cars is still very weak, and many car owners do not understand reasonable maintenance. There are some models with a large mileage, a long service life and no change of transmission oil. Then the problem is, can we really change the transmission oil of an old car? How on earth did it break down? Shandong transmission maintenance personnel will explain it to you.
舉例：一輛擁有五年車齡，十萬公里都沒有換過變速箱油的車型。
For example: a vehicle that is five years old and has not changed the transmission oil for 100000 kilometers.
變速箱油濾芯和變速箱油底殼整合到了一起，典型的采埃孚變速箱設計。在油底殼上還有四塊吸鐵石專門用來吸附沉積在油底殼上面的鐵屑和油泥，雙層保險貌似可以讓這臺變速箱油可以擁有超長的換油周期。
The transmission oil filter element and the transmission oil pan are integrated together, which is a typical ZF transmission design. There are also four magnets on the oil pan specially used to absorb iron filings and oil sludge deposited on the oil pan. It seems that the double-layer safety can allow this transmission oil to have an ultra long oil change cycle.
將油底殼上的吸鐵石收集到一起之后，可以見到吸鐵石上面布滿了多的油泥，厚厚的一層足有幾毫米。
After collecting the magnets on the oil pan, you can see that the magnets are covered with oil sludge, a thick layer of several millimeters.
它此刻的變速箱油也是黑的夠可以，足夠當一面反光鏡了。那么這么多的油泥和油液，更換新的油液變速箱性能應該是更好才對啊，但為什么會有很大的概率損壞變速箱呢？
At the moment, the transmission oil is black enough to be a mirror. With so much sludge and oil, the performance of the transmission should be better if it is replaced with a new oil. But why is there a great probability that the transmission will be damaged?
說到這里，就不得不說一下自動變速箱的工作原理了。
At this point, we have to talk about the working principle of automatic transmission.
自動變速箱能夠實現換擋主要是依靠電控機構，這套機構叫做——閥體。閥體在自動變速箱的角色是一個控制機構，通過不斷變換油液走向進行換擋，達到增速降扭和降速增扭的目的。當一臺車公里數逐漸大的時候，變速箱油也會變得越來越粘稠。
The automatic transmission can shift gears mainly by electronic control mechanism, which is called valve body. The valve body is a control mechanism in the automatic transmission. It shifts gears by constantly changing the direction of the oil to achieve the purpose of increasing speed, reducing torque and decreasing speed and increasing torque. When the mileage of a vehicle gradually increases, the transmission oil will become more and more viscous.
自動擋的變速箱油是一種標準的液壓油，是利用油液來傳遞液壓力。那么當變速箱油開始變粘稠后，會導致傳遞的液壓力發生變化。但是變速箱閥體本身是有自適應功能的，其實應該叫自我偏差修正?？梢愿鶕鸵赫扯炔粩嗟淖兓淖冮y體傳遞的液壓力，以達到合適的時機升檔和降檔。
Automatic transmission oil is a standard hydraulic oil, which uses oil to transmit hydraulic pressure. When the transmission oil starts to become viscous, the transmitted hydraulic pressure will change. However, the transmission valve body itself has an adaptive function, which should be called self deviation correction. The hydraulic pressure transmitted by the valve body can be changed according to the constant change of the viscosity of the oil to achieve the upshift and downshift at the appropriate time.
傳遞液壓力的關鍵部件，就是這個蓄壓器。無論是AT、CVT還是DCT，只要有閥體的存在，就有蓄壓器的存在。
The key component for transmitting hydraulic pressure is the accumulator. Whether it is at, CVT or DCT, as long as there is a valve body, there is an accumulator.
那么變速箱油突然更新之后，油液粘度會明顯的降低，會變得很稀。但閥體還是按照之前粘稠的油液傳遞液壓力，在蓄壓器處就會產生泄壓，離合器在結合時就會出現沖擊和延遲。體現出來就是變速箱頓挫，還可能會燒毀離合器。這就是為什么一些公里數較大的車型，突然換了新變速箱油之后，變速箱出問題的主要原因。
After the transmission oil is suddenly renewed, the viscosity of the oil will obviously decrease and become very thin. However, the valve body still transmits the hydraulic pressure according to the previous viscous oil, which will cause pressure relief at the accumulator and impact and delay when the clutch is engaged. This is reflected in the gearbox setback, which may also burn the clutch. This is the main reason why some models with large mileage have problems with the transmission after suddenly changing the new transmission oil.
琳瑯滿目的各種閥體，說明閥體故障已經很常見了。
The dazzling variety of valve bodies shows that valve body failures are very common.
導致變速箱出問題的還有一個原因，就是變速箱油的錯亂加注行為。后市場魚龍混雜，有很多人將AT的變速箱油加到CVT的變速箱里面，這樣亂搞，變速箱不壞才怪！所以改善汽車維修環境和加強自身的汽車知識，真的很有必要。
Another reason for the problem of the transmission is the disordered filling of the transmission oil. The aftermarket is a mixed bag of good and bad people. Many people add at gearbox oil to CVT gearbox. It's strange if the gearbox doesn't break down after such a mess! Therefore, it is really necessary to improve the automobile maintenance environment and strengthen one's own automobile knowledge.
那么老車應該怎樣更換變速箱油呢？一般情況下，公里數超過15萬年限的超過八年的車型，更換變速箱油的時候都要注意了，切記不要使用循環機更換，重力換也盡量不要釋放干凈，爭取分多次將變速箱油更換掉，給閥體一個逐步適應的時間。雖然這樣很浪費錢，又很浪費時間，但是跟修變速箱相比還是能省不少錢的。
How should the old car change the transmission oil? In general, for vehicles with more than 150000 kilometers and more than eight years of service, attention should be paid to changing the transmission oil. Remember not to use a circulating machine for replacement, and try not to release the oil as clean as possible for gravity replacement. Try to replace the transmission oil several times to give the valve body a time to gradually adapt. Although this is a waste of money and time, it can save a lot of money compared with repairing the gearbox.
Changing the transmission oil is a common maintenance item in the process of vehicle maintenance. If the transmission is properly maintained, there are few failures. If you are interested in the maintenance content, please come to our website http://www.566605.com Consult!
