Why is it not recommended to change the transmission oil with a cycle machine?

There are currently two methods for changing gearbox oil: one is the gravity oil change method, and the other is the cyclic oil change method. More people choose to use the gravity oil change method. Some professionals do not recommend the second method. Then why not use a cycle machine to change the gearbox oil?

The oil change of the cycle machine while injecting new oil, while drawing out the new and old mixed oil, the oil change rate is high, the oil change is more thorough, but the oil consumption is large, it is wasteful, and the cost is high. A car with a long use time and a long driving range without changing the gearbox oil for a long time will produce certain precipitated impurities during use of the gearbox. These impurities will stick to the torque converter as the gearbox oil flows. , Hydraulic valve body module oil passages may be deposited in the oil pan and gearbox filter element. The longer the time, the more accumulation.

It is not recommended to use a cycle machine to change the transmission oil. In fact, it is aimed at this kind of high-kilometer automatic transmission, because there are certain risks. If the cycle machine is used to change the oil, it can stick to the hydraulic torque converter and the hydraulic valve body. The module oil passage or impurities deposited in the oil pan and gearbox filter element are removed, but they will block the torque converter, hydraulic valve body, gearbox filter and other components as the pipeline flows, resulting in poor oil flow, Malfunctions such as stuck solenoid valve.Therefore, it is the most correct way to choose the appropriate oil change method according to the specific use of the car and the model of the gearbox.