某汽車出現變速箱故障，車主尋求幫助，經過技師路試，判斷故障現象為：掛擋沖擊，同時1擋升2擋有沖擊，2擋升3擋打滑，確定為變速箱閥體損壞癥狀。引起變速箱閥體損壞的原因是什么呢？下面濟南自動變速箱維修人員為您分析：

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:

很大一個因素是變速箱油，油用久了會變臟，里面就會有雜質，潤滑性能下降，會引起閥體閥道內的卡滯或者偏磨，時間久了造成升檔降檔沖擊。而且這款變速箱里程數一高，很容易出現密封圈老化漏油，包括油泵密封圈，變扭器油封都是常見漏油的地方。平時做保養的時候，舉升機上頂起來都可以看一下，出現滲油漏油的情況，建議盡早處理。

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.

變速箱和發動機通過變扭器連接

The transmission and engine are connected through a torque converter

抬下的變速箱總成，圓形的這個腔體內裝著變扭器

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

液力變扭器又稱“大力鼓”，發動機動力經過飛輪輸出后傳遞給變扭器，帶動變扭器運轉，里面的渦扇設計會產生壓力，進而實現變速箱工作。

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.

這個是鼓輪外觀。發現變速箱故障后，必須去的維修變速箱的維修廠或者去對應品牌的汽車4S店進行全面檢查。

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.

常見的幾處漏油點，包括發動機漏油，變速箱在車上的時候很難分辨出到底是哪一處漏油，從下面看油乎乎的一大片，需要有經驗的師傅來判斷。

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.

拆掉油底殼，內置閥體。

Remove the oil pan and insert the valve body.

閥體里面有閥道，包括電磁閥里面也有小閥芯移動，如果閥道內磨損導致不通暢或者電磁閥故障都會造成油壓不穩定，產生換擋頓挫。

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.

所以閥體要用專用設備經過檢測，修復，或者更換。

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

如果這篇文章對您有幫助的話可收藏，更多變速箱的故障案例可以關注“海森汽車深養護”微信公眾號，里面有許多案例分享，讓你修變速箱不會被坑。

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.

內部的機械傳動件，依次拿出油泵，差速器，離合器制動器等。

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

差速器，在變速箱內起到變速箱輸出軸和半軸連接的作用，同時還可以起到速比轉換的作用。

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.

剖開油泵檢查。

Cut open the oil pump for inspection.

檢查里面的離合器片，變速箱如果油壓長期不夠容易引起離合器片磨損，燒蝕，開起來會有打滑的感覺。

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.

制動器的作用就是固定行星齒輪機構中的元件，防止其轉動，控制變速器的速比變化。制動器有片式和帶式兩種形式，老款的很多是采用制動帶形式。

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.

超聲波清洗配件，因為變速箱是個很精密的設備，長期的齒輪傳遞和離合器工作都會引起磨損，內部的雜質和油泥都需要清洗干凈，裝配完整，試車正常，故障消失。更多相關內容就來我們網站http://www.ihudie.cn咨詢了解！

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.ihudie.cn Consultation and understanding!