某汽车出现变速箱故障，车主寻求帮助，经过技师路试，判断故障现象为：挂挡冲击，同时1挡升2挡有冲击，2挡升3挡打滑，确定为变速箱阀体损坏症状。引起变速箱阀体损坏的原因是什么呢？下面济南自动变速箱维修人员为您分析：

A certain car experienced a gearbox malfunction, and the owner sought help. After a road test by a technician, it was determined that the malfunction was caused by a gear shift impact, while there was an impact in the first and second gears, and a slipping in the second and third gears. It was determined that the symptom was a damaged transmission valve body. What is the cause of damage to the transmission valve body? Below, Jinan automatic transmission maintenance personnel will analyze for you:

很大一个因素是变速箱油，油用久了会变脏，里面就会有杂质，润滑性能下降，会引起阀体阀道内的卡滞或者偏磨，时间久了造成升档降档冲击。而且这款变速箱里程数一高，很容易出现密封圈老化漏油，包括油泵密封圈，变扭器油封都是常见漏油的地方。平时做保养的时候，举升机上顶起来都可以看一下，出现渗油漏油的情况，建议尽早处理。

A major factor is transmission oil, which can become dirty and contain impurities after prolonged use, leading to a decrease in lubrication performance and causing sticking or eccentric wear in the valve body and passage. Over time, this can cause upshifting and downshifting impacts. Moreover, as the mileage of this gearbox increases, it is easy to experience aging and oil leakage of the sealing ring, including the oil pump sealing ring and torque converter oil seal, which are common sources of oil leakage. When performing maintenance, you can take a look at the lift when it is lifted. If there is any oil leakage, it is recommended to handle it as soon as possible.

变速箱和发动机通过变扭器连接

The transmission and engine are connected through a torque converter

抬下的变速箱总成，圆形的这个腔体内装着变扭器

The lifted gearbox assembly has a circular cavity containing a torque converter

液力变扭器又称“大力鼓”，发动机动力经过飞轮输出后传递给变扭器，带动变扭器运转，里面的涡扇设计会产生压力，进而实现变速箱工作。

The hydraulic torque converter, also known as the "powerful drum", transmits engine power to the torque converter after being output by the flywheel, driving it to operate. The turbofan design inside generates pressure, which in turn enables the gearbox to work.

这个是鼓轮外观。发现变速箱故障后，必须去的维修变速箱的维修厂或者去对应的汽车4S店进行检查。

This is the appearance of the drum. After discovering a gearbox malfunction, it is necessary to go to a professional gearbox repair shop or a corresponding brand of car 4S store for a comprehensive inspection.

常见的几处漏油点，包括发动机漏油，变速箱在车上的时候很难分辨出到底是哪一处漏油，从下面看油乎乎的一大片，需要有经验的师傅来判断。

There are several common oil leakage points, including engine oil leakage. It is difficult to distinguish which part of the transmission is leaking when it is in the car. From below, there is a large oily area that requires experienced technicians to judge.

拆掉油底壳，内置阀体。

Remove the oil pan and insert the valve body.

阀体里面有阀道，包括电磁阀里面也有小阀芯移动，如果阀道内磨损导致不通畅或者电磁阀故障都会造成油压不稳定，产生换挡顿挫。

There is a valve passage inside the valve body, including a small valve core inside the solenoid valve. If the wear in the valve passage causes blockage or the solenoid valve malfunctions, it can cause unstable oil pressure and cause gear shifting jerks.

所以阀体要用专用设备经过检测，修复，或者更换。

So the valve body needs to be tested, repaired, or replaced with specialized equipment.

如果这篇文章对您有帮助的话可收藏，更多变速箱的故障案例可以关注“海森汽车深养护”微信公众号，里面有许多案例分享，让你修变速箱不会被坑。

If this article is helpful to you, you can collect it. More gearbox failure cases can follow the WeChat official account of "Heisen Auto Deep Maintenance". There are many cases to share, so that you can repair the gearbox without being trapped.

内部的机械传动件，依次拿出油泵，差速器，离合器制动器等。

Take out the internal mechanical transmission components, including the oil pump, differential, clutch brake, etc. in sequence.

差速器，在变速箱内起到变速箱输出轴和半轴连接的作用，同时还可以起到速比转换的作用。

The differential plays a role in connecting the output shaft and half shaft of the gearbox, and also plays a role in speed ratio conversion.

剖开油泵检查。

Cut open the oil pump for inspection.

检查里面的离合器片，变速箱如果油压长期不够容易引起离合器片磨损，烧蚀，开起来会有打滑的感觉。

Check the clutch plates inside. If the oil pressure in the gearbox is not sufficient for a long time, it is easy to cause wear and erosion of the clutch plates, and there may be a feeling of slipping when driving.

制动器的作用就是固定行星齿轮机构中的元件，防止其转动，控制变速器的速比变化。制动器有片式和带式两种形式，老款的很多是采用制动带形式。

The function of the brake is to fix the components in the planetary gear mechanism, prevent them from rotating, and control the speed ratio change of the transmission. There are two types of brakes: disc and band, with many of the older models using the brake band form.

超声波清洗配件，因为变速箱是个很精密的设备，长期的齿轮传递和离合器工作都会引起磨损，内部的杂质和油泥都需要清洗干净，装配完整，试车正常，故障消失。更多相关内容就来我们网站http://www.jnbsx.com咨询了解！

Ultrasonic cleaning accessories, because the gearbox is a very precise equipment, long-term gear transmission and clutch operation can cause wear, and internal impurities and oil sludge need to be cleaned, assembled completely, tested normally, and the fault disappears. For more related content, come to our website http://www.jnbsx.com Consultation and understanding!