Fault situation: Abnormal noise is called abnormal noise in the maintenance industry. During the operation of a car, there is a common abnormal noise inside the automatic transmission. The automatic transmission makes a abnormal noise while the car is in motion, and the abnormal noise disappears after parking and shifting gears.

一般来说，原因如下几个方面：

Generally speaking, the reasons are as follows:

※油泵因磨损过甚或自动变速器油面高度过低、过高而产生异响

The oil pump may produce abnormal noise due to excessive wear or even low or high automatic transmission oil level

※液力变矩器因锁止离合器、导轮单向超越离合器等损坏而产生异响

The hydraulic torque converter produces abnormal noise due to damage to the lock up clutch, guide wheel one-way overrunning clutch, etc

※行星齿轮机构异响

※ Abnormal noise from planetary gear mechanism

※换档执行元件异响

※ Abnormal noise from shift actuator

解决方法：

Solution:

※检查自动变速器油油面高度。若太高或太低，应调整至正确高度。

※ Check the oil level of the automatic transmission. If it is too high or too low, it should be adjusted to the correct height.

※应举升器将汽车升起，起动发动机，在空档、前进档、倒档等状态下检查自动变速器产生异响的部位和时刻。

※ The car should be raised with a hoist, the engine should be started, and the location and timing of abnormal noise generated by the automatic transmission should be checked in neutral, forward, reverse, and other states.

※若在任何档位下自动变速器前部始终有连续的异响，通常为油泵或液力变矩器异响，对此，应拆检自动变速器，检查油泵有无磨损、液力变矩器内有无大量摩擦粉末。如有异常，应更换油泵或液力变矩器。

If there is continuous abnormal noise at the front of the automatic transmission in any gear, usually from the oil pump or hydraulic torque converter, the automatic transmission should be disassembled and inspected for wear on the oil pump and a large amount of friction powder inside the hydraulic torque converter. If there are any abnormalities, the oil pump or hydraulic torque converter should be replaced.

※若自动变速器只有在行驶中才有异响，空档时无异响，则为行星齿轮机构异响。对此，应分解自动变速器，检查行星齿轮机构各个零件有无磨损痕迹、齿轮有无断裂，单向超越离合器有无磨损、卡滞，轴承或止推垫片有无损坏。如有异常，应予以更换。

If the automatic transmission only makes abnormal noise during driving and there is no abnormal noise in neutral, it is a planetary gear mechanism abnormal noise. In this regard, the automatic transmission should be disassembled and checked for signs of wear on various parts of the planetary gear mechanism, gear breakage, one-way overrunning clutch wear and jamming, and bearings or thrust washers for damage. If there are any abnormalities, they should be replaced.