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

汽车自动变速箱常见的有三种型式：分别是液力自动变速箱（简称AT）、机械无级自动变速箱（简称CVT)、电控机械自动变速箱（简称AMT）

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

拆卸前的准备查对变速箱型号，向配件供应商了解该型号变速箱配件供应情况，在不能保证起码的易损件和必换件的情况下，不应立即拆卸解体。对于罕见的车种，这一点尤为重要。一般不要采取先解体，找到损坏件后再找配件的做法。这样做往往会造成因配件困难，解体后由于密封圈，垫片等损坏而无法恢复的尴尬局面。

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.

放干变速箱机油，卸下优盘，仔细检查残油种的杂质部分。一般来说，含有深褐色或黑色粉末为离合器片磨损，亮白色金属粉末为油泵,单项离合器,齿轮机构磨损.这能进一步验证原来判断的准确性.从车上拆下变速箱因受车身底板形状和位置的限制,直接从发动机后部拆下变速箱往往显得空间不够.更可靠的办法就是连同发动机一同从车上吊下,但这种方法需要增加许多辅助工作,适合发动机本身也需要解体检修时采用.

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

在单独检修发动机时,可松开发动机后支承,使发动机后部下坠,以腾出变速箱上部的空间,有利于拆卸.   把变速箱拉离发动机时,应沿轴向拉动,可伴以绕轴线的顺和反方向转动,但不得上下左右摆动,以免损坏变速箱输入轴与液力耦合器或变矩器连接部分的表面状况与配合.变速箱的解体与装合。

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.