一、自动变速器异响部分汽车在行驶过程中，自动变速器内有异响声或者汽车行驶中自动变速器有异响，停车挂空挡后异响消失。故障排除：这情况一般是由于油泵磨损过度或自动变速器油面高度过低、过高而产生异响；液离变矩器因锁止离合器、导轮单向离合器等损坏产生异响；行星齿轮机构异响；换档执行元件异响。

1、 Automatic transmission abnormal noise: During the driving process of a car, there may be abnormal noises inside the automatic transmission or during the driving process, and the abnormal noises disappear after parking and shifting to neutral. Troubleshooting: This situation is generally caused by excessive wear of the oil pump or abnormal noise caused by the automatic transmission oil level being too low or too high; The hydraulic torque converter produces abnormal noise due to damage to the lock up clutch, guide wheel one-way clutch, etc; Abnormal noise from planetary gear mechanism; Gear shift actuator makes abnormal noise.

二、自动变速器油易变质这种情况一般由于更换后的新自动变速器油使用不久后变质；自动变速器温度太高，加油口处冒烟。故障排除：这种情况一般由于汽车使用不当，经常超负荷行驶，如经常用于拖车或经常急加速行驶等；自动变速器油散热器管堵塞；自动变速器油散热器的限压阀卡滞；离合器或制动器自由间隙太大；主油路油压太低，离合器或制动器打滑。

2、 Automatic transmission oil is prone to deterioration, which is generally due to the deterioration of the newly replaced automatic transmission oil shortly after use; The temperature of the automatic transmission is too high, and smoke is coming from the fuel filler. Troubleshooting: This situation is generally caused by improper use of the car, often overloading, such as frequent use for towing or frequent rapid acceleration driving; Automatic transmission oil radiator pipe blockage; The pressure limiting valve of the automatic transmission oil radiator is stuck; The free clearance of the clutch or brake is too large; The main oil pressure is too low, causing the clutch or brake to slip.

三、自动变速器不能强制降挡举个例子；如以三挡或超速挡行驶时，突然将加速踏板踩到底，自动变速器不能立即降低一个挡位，致使汽车加速无力。故障排除：节气门拉索或节气门位置传感器调整不当；强制降挡开关损坏或安装不当；强制降挡电磁阀损坏或线路短路；阀板中的强制降挡控制阀卡滞。

3、 The automatic transmission cannot downshift forcefully, for example; When driving in third gear or overdrive, if the accelerator pedal is suddenly pressed all the way down, the automatic transmission cannot immediately lower one gear, causing the car to accelerate weakly. Troubleshooting: Improper adjustment of throttle cable or throttle position sensor; Damaged or improperly installed forced downshift switch; The forced downshift solenoid valve is damaged or the circuit is short circuited; The forced downshift control valve in the valve plate is stuck.

四、挂挡后发动机怠速易熄火发动机怠速运转时将换挡操纵手柄由P位或N位换入R位、D位、3位、2位、1位时发动机熄火；在前进挡或倒挡行驶中，踩下制动踏板停车时发动机熄火。故障排除：发动机怠速过低；阀板中的锁止控制阀卡滞；挡位开关有故障；输入轴转速传感器有故障。

4、 After shifting gears, the engine is prone to stalling when idling. When the engine is running at idle, shift the shift control lever from P or N position to R, D, 3, 2, or 1 position to turn off the engine; When driving in forward or reverse gear, the engine stalls when the brake pedal is pressed to stop. Troubleshooting: Engine idling too low; The locking control valve in the valve plate is stuck; The gear switch is faulty; The input shaft speed sensor is faulty.

五、自动变速器无锁止汽车行驶中车速、挡位已经满足锁止离合器起作用的条件，但锁止离合器仍没有产生锁止作用，并且汽车油耗很大。故障排除：自动变速器油温度传感器故障；节气门位置传感器有故障；锁止电磁阀故障或线路短路、断路；锁止控制阀故障；液力变矩器中的锁止离合器损坏。

5、 The speed and gear of an automatic transmission without lock up have met the conditions for the lock up clutch to function during driving, but the lock up clutch has not yet produced a lock up effect, and the car consumes a lot of fuel. Troubleshooting: Automatic transmission oil temperature sensor malfunction; The throttle position sensor is faulty; Lock solenoid valve malfunction or short circuit or open circuit in the circuit; Lock control valve malfunction; The lock up clutch in the hydraulic torque converter is damaged.

六、汽车无发动机制动汽车行驶时，当换挡操纵手柄位于前进低（3或2、1）位置时，松开加速踏板，发动机转速降怠速，但汽车没有明显减速；汽车下坡时，换档操纵手柄位于前进挡，但不能产动机制动作用。故障排除：挡位开关调整不当；换档操纵手柄调整不当；二挡强制制动器打滑或低及倒挡制动器打滑；控制发动机制动的电磁阀有故障；阀板有故障；自动变速器打滑；

6、 When the car is driving without engine braking, when the shift control lever is in the forward low (3 or 2, 1) position, release the accelerator pedal, and the engine speed drops to idle, but the car does not slow down significantly; When the car is going downhill, the shift control lever is in forward gear, but it cannot produce engine braking effect. Troubleshooting: Improper adjustment of gear switch; Improper adjustment of the shift control lever; Second gear forced brake slipping or low and reverse gear brake slipping; The electromagnetic valve that controls engine braking is faulty; The valve plate is faulty; Automatic transmission slipping;

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