Automatic transmission is a kind of equipment which can automatically shift according to the engine speed.

汽車自動變速箱常見的有三種型式：分別是液力自動變速箱（簡稱AT）、機械無級自動變速箱（簡稱CVT)、電控機械自動變速箱（簡稱AMT）

There are three types of automotive automatic transmission: hydraulic automatic transmission (at), mechanical stepless automatic transmission (CVT) and electronic mechanical automatic transmission (AMT)

拆卸前的準備查對變速箱型號，向配件供應商了解該型號變速箱配件供應情況，在不能保證起碼的易損件和必換件的情況下，不應立即拆卸解體。對于罕見的車種，這一點尤為重要。一般不要采取先解體，找到損壞件后再找配件的做法。這樣做往往會造成因配件困難，解體后由于密封圈，墊片等損壞而無法恢復的尷尬局面。

Before disassembly, check the gearbox model and ask the accessory supplier about the supply of the gearbox accessories. If the minimum number of vulnerable parts and necessary replacement parts cannot be guaranteed, the disassembly shall not be carried out immediately. This is particularly important for rare types of vehicles. Generally, do not take the first disassembly, find the damaged parts and then find the accessories. In this way, it will cause the embarrassment that the parts are difficult to be disassembled and the sealing ring and gasket can not be recovered after disassembly.

放干變速箱機油，卸下優盤，仔細檢查殘油種的雜質部分。一般來說，含有深褐色或黑色粉末為離合器片磨損，亮白色金屬粉末為油泵,單項離合器,齒輪機構磨損.這能進一步驗證原來判斷的準確性.從車上拆下變速箱因受車身底板形狀和位置的限制,直接從發動機后部拆下變速箱往往顯得空間不夠.更可靠的辦法就是連同發動機一同從車上吊下,但這種方法需要增加許多輔助工作,適合發動機本身也需要解體檢修時采用.

Drain the gearbox oil, remove the USB flash disk, and carefully check the impurity part of the residual oil. Generally speaking, dark brown or black powder is the wear of clutch plate, and the bright white metal powder is the wear of oil pump, single clutch and gear mechanism. This can further verify the accuracy of the original judgment, The most reliable way is to lift the gearbox from the vehicle together with the engine. However, this method needs a lot of auxiliary work, which is suitable for the engine itself when it needs to be disassembled and overhauled

Automatic transmission maintenance

在單獨檢修發動機時,可松開發動機后支承,使發動機后部下墜,以騰出變速箱上部的空間,有利于拆卸.   把變速箱拉離發動機時,應沿軸向拉動,可伴以繞軸線的順和反方向轉動,但不得上下左右擺動,以免損壞變速箱輸入軸與液力耦合器或變矩器連接部分的表面狀況與配合.變速箱的解體與裝合。

When the engine is overhauled separately, the rear support of the engine can be loosened to make the rear part of the engine fall down to make room for the upper part of the gearbox, which is conducive to disassembly. When the gearbox is pulled away from the engine, it should be pulled along the axial direction, and can rotate in the direction of the axis, but it should not swing up, down, left or right, In order to avoid damaging the surface condition and fit of transmission input shaft and hydraulic coupling or torque converter connecting part. Disassembly and assembly of gearbox.