自动变速箱是与手动变速箱相比，可以根据发动机的变速自动更换的设备。汽车自动变速箱常见的有液力自动变速箱(简称AT)、机械无级自动变速箱(简称CVT)、电子控制机械自动变速箱(简称AMT)三种类型。自动变速箱维护要点分析。

An automatic transmission is a device that can automatically shift gears according to the engine speed, as opposed to a manual transmission. There are three common types of automatic transmissions for automobiles: hydraulic automatic transmissions (abbreviated as AT), mechanically continuously variable automatic transmissions (abbreviated as CVT), and electronically controlled mechanical automatic transmissions (abbreviated as AMT). Analysis of the key points of automatic transmission maintenance.

1拆卸前的准备工作。

1. Preparations before disassembly.

2从车上拆下变速箱。

Remove the transmission from the vehicle.

3变速箱的拆卸和组装。

Dismantling and assembly of the gearbox.

拆卸前的准备工作。

Preparations before disassembly.

调查变速箱的型号，向零部件供应商了解该型号的变速箱零部件的供应状况，如果至少不能消耗零部件和必须更换零部件，请不要立即拆卸。对于罕见的车型，这一点尤为重要。一般不要先拆卸，找到损坏的零件后再找零件。这往往会导致附件困难、密封圈、垫片等破损而无法恢复的尴尬局面。

Investigate the model of the gearbox and inquire with parts suppliers about the supply status of gearbox parts for that model. If the parts are at least consumable and must be replaced, please refrain from dismantling immediately. This is particularly crucial for rare vehicle models. Generally, do not dismantle first and then search for parts after finding the damaged ones. This often leads to awkward situations where accessories, seals, gaskets, etc. are damaged beyond recovery.

放干变速箱机油，卸下优盘，仔细检查残油种类的杂质部分。一般来说，深棕色或黑色粉末是离合器片磨损，明亮的白色金属粉末是油泵，单个离合器，齿轮机构磨损。这可以进一步验证原判断的正确性

　　从车上拆下变速箱。

Drain the transmission oil, remove the USB drive, and carefully inspect the impurities in the residual oil. Generally speaking, dark brown or black powder indicates wear on the clutch disc, while bright white metal powder indicates wear on the oil pump, individual clutches, and gear mechanism. This can further verify the correctness of the original judgment. Remove the transmission from the vehicle.

由于车身底板的形状和位置受到限制，从发动机的后部直接拆下变速往往空间不足。可靠的方法是和发动机一起从车上吊下来，这种方法需要增加很多辅助工作，发动机本身也需要拆卸检查时采用

　　单独检查发动机时，松开发动机后支撑，从发动机后部掉落，从变速箱上部的空间中腾出，有助于拆卸

　　将变速箱拉离发动机时，沿轴向拉动，可以沿轴线的顺和反方向旋转，但不得上下左右摆动，以免损坏变速箱输入轴和液力耦合器或变矩器连接部分的表面状况

Due to the limited shape and position of the vehicle's floor pan, there is often insufficient space to remove the transmission directly from the rear of the engine. A reliable method is to lift the engine and transmission together from the vehicle, but this approach requires a lot of additional work, and the engine itself also needs to be disassembled for inspection. When inspecting the engine separately, loosen the engine's rear support, drop it from the rear of the engine, and free up space from the upper part of the transmission, which facilitates removal. When pulling the transmission away from the engine, pull it axially, and it can be rotated in both directions along the axis, but it must not be swung up and down or side to side to avoid damaging the surface condition of the transmission input shaft and the hydraulic coupler or torque converter connection part