Is it necessary to use a circulation machine for transmission fluid replacement?

[McReid]

Whether it is necessary to use a circulation machine for transmission fluid replacement depends on specific circumstances. Here is a detailed introduction to circulation machine fluid replacement: 1. Fluid replacement method: The circulation machine injects new fluid while extracting the mixed old and new fluid, resulting in a high replacement rate and more thorough fluid replacement. However, it consumes more fluid, is relatively wasteful, and incurs higher costs. 2. Reasons not to recommend using a circulation machine: It is not recommended to use a circulation machine for transmission fluid replacement, especially for automatic transmissions with high mileage, due to certain risks. While the circulation machine can remove impurities stuck in the torque converter, hydraulic valve body module oil passages, or deposited in the oil pan and transmission filter, these impurities may flow through the pipes and clog components such as the torque converter, hydraulic valve body, and transmission filter screen. This can lead to issues like poor oil flow and solenoid valve sticking. Therefore, the appropriate fluid replacement method should be chosen based on the vehicle's specific usage conditions and transmission model.