实际上很多人对汽车的知识还很薄弱，不懂合理保养的车主大有人在。这里就不乏出现一些数很大年限很高，没换过变速箱油的车型。那么问题来了，老车真的不可以更换变速箱油吗？它又究竟是怎么坏掉的呢？
山东变速箱维修人员为您讲解一番。
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.
举例：一辆拥有五年车龄，十万都没有换过变速箱油的车型。
For example: a vehicle that is five years old and has not changed the transmission oil for 100000 kilometers.
变速箱油滤芯和变速箱油底壳整合到了一起，典型的采埃孚变速箱设计。在油底壳上还有四块吸铁石专门用来吸附沉积在油底壳上面的铁屑和油泥，双层保险貌似可以让这台变速箱油可以拥有超长的换油周期。
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.
将油底壳上的吸铁石收集到一起之后，可以见到吸铁石上面布满了多的油泥，厚厚的一层足有几毫米。
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.
它此刻的变速箱油也是黑的够可以，足够当一面反光镜了。那么这么多的油泥和油液，更换新的油液变速箱性能应该是更好才对啊，但为什么会有很大的概率损坏变速箱呢？
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?
说到这里，就不得不说一下自动变速箱的工作原理了。
At this point, we have to talk about the working principle of automatic transmission.
自动变速箱能够实现换挡主要是依靠电控机构，这套机构叫做——阀体。阀体在自动变速箱的角色是一个控制机构，通过不断变换油液走向进行换挡，达到增速降扭和降速增扭的目的。当一台车数逐渐大的时候，变速箱油也会变得越来越粘稠。
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.
自动挡的变速箱油是一种标准的液压油，是利用油液来传递液压力。那么当变速箱油开始变粘稠后，会导致传递的液压力发生变化。但是变速箱阀体本身是有自适应功能的，其实应该叫自我偏差修正。可以根据油液粘度不断的变化改变阀体传递的液压力，以达到合适的时机升档和降档。
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.
传递液压力的关键部件，就是这个蓄压器。无论是AT、CVT还是DCT，只要有阀体的存在，就有蓄压器的存在。
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.
那么变速箱油突然更新之后，油液粘度会明显的降低，会变得很稀。但阀体还是按照之前粘稠的油液传递液压力，在蓄压器处就会产生泄压，离合器在结合时就会出现冲击和延迟。体现出来就是变速箱顿挫，还可能会烧毁离合器。这就是为什么一些数较大的车型，突然换了新变速箱油之后，变速箱出问题的主要原因。
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.
琳琅满目的各种阀体，说明阀体故障已经很常见了。
The dazzling variety of valve bodies shows that valve body failures are very common.
导致变速箱出问题的还有一个原因，就是变速箱油的错乱加注行为。后市场鱼龙混杂，有很多人将AT的变速箱油加到CVT的变速箱里面，这样乱搞，变速箱不坏才怪！所以改善汽车维修环境和加强自身的汽车知识，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.
那么老车应该怎样更换变速箱油呢？一般情况下，数超过15万年限的超过八年的车型，更换变速箱油的时候都要注意了，切记不要使用循环机更换，重力换也尽量不要释放干净，争取分多次将变速箱油更换掉，给阀体一个逐步适应的时间。虽然这样很浪费钱，又很浪费时间，但是跟修变速箱相比还是能省不少钱的。
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.jnbsx.com Consult!
