How to Change Transmission Fluid with a Flush Machine?
2 Answers
Failure to replace automatic transmission fluid for an extended period can lead to reduced lubrication performance, thinning viscosity, decreased sealing capability, increased resistance and wear, resulting in unstable pressure and compromised hydraulic system precision. Below is the procedure for changing transmission fluid using a flush machine: 1. First, locate the vehicle's external flush machine connection port; 2. After locating the port, identify the inlet and outlet hoses; 3. Connect the machine's hoses to the flush machine and fill the container with automatic transmission fluid; 4. Proceed with the fluid change (Note: During the process, carefully monitor the hoses for any leakage).
Last time I changed the transmission fluid myself using a flush machine, and the process was simpler than expected. First, I drove the car for a short distance to warm it up to normal engine temperature, which improved the flow of the old fluid. I prepared a flush machine, new transmission fluid (selected according to the manual specifications), a funnel, and a waste fluid container. Then, I located the transmission cooler return line in the engine bay, connected the machine's inlet and outlet hoses, and ensured there were no air leaks. With the engine idling, I turned on the flush machine, and new fluid slowly replaced the old fluid, which flowed into the waste container. I monitored the color change of the outgoing fluid, and as soon as it turned from dark to as clear as the new fluid, I immediately stopped the machine. The entire process took about 20 minutes, and I used double the amount of transmission fluid to ensure a thorough replacement. The advantage is that it completely removes old fluid deposits, preventing transmission issues like sticking. Finally, I checked the fluid level was within the proper range and tested the gear shifts for smoothness before finishing up. This method is more efficient than the traditional gravity drain, though the only downside is the extra cost of renting the machine, but it's better for long-term vehicle maintenance.
