How to Change Transmission Fluid with a Flushing Machine?
2 Answers
Flushing machine is a device that uses mechanical pressure to dynamically replace automatic transmission fluid, achieving a fluid replacement rate of over 80%. The operation process is simple but requires equipment support. There are 7 steps to change transmission fluid with a flushing machine: 1. Remove the undercarriage shield: Remove the shield and loosen the drain plug; 2. Expose the transmission: Expose the transmission and remove the oil pan; 3. Clean: Clean the oil pan; 4. Reinstall the oil pan and add fluid: Reinstall the oil pan and fill with transmission fluid; 5. Open transmission screw holes: Open the transmission drain and fill screw holes, then insert the flushing machine's inlet and outlet tubes into the transmission; 6. Start the vehicle: Start the vehicle and shift through all gears; 7. Observe the fluid inspection window: When the color in the inspection window turns clear red, the flushing process is complete.
Last time I went to the auto repair shop, I saw them using a transmission fluid exchange machine to change the transmission fluid. The whole process was quite professional. The technician first let the car idle to warm up, then located the transmission cooler line connections and matched the machine's hoses by color. While pumping new fluid from the container into the transmission, the old fluid was simultaneously pushed out into the waste oil tank. During operation, they carefully monitored the fluid temperature to prevent overheating that could damage components, and ensured precise fluid volume. The entire process took about 30 minutes to an hour, achieving a much more thorough replacement than manual methods - removing over 90% of old fluid contaminants. DIY attempts risk incorrect hose connections that could damage the transmission, so it's best to have this service performed at a reputable shop where the charges are reasonable and the work is done safely.
