How to Change Transmission Oil with a Flushing Machine?
2 Answers
Methods for changing transmission oil with a flushing machine: 1. The first method is similar to changing engine oil, where the transmission's drain plug is unscrewed to drain and refill the oil. 2. The second method involves directly removing the oil pan to drain and refill the oil. 3. The third method is currently more advanced, using a flushing machine to change automatic transmission oil. The first two methods are widely used today because they are cost-effective (requiring less oil) and do not require repair shops to purchase additional equipment. However, there are drawbacks: traditional gravity oil change methods cannot "completely" replace the transmission oil, while using a flushing machine to change automatic transmission oil effectively addresses this shortcoming.
I've personally done the transmission fluid change using a flushing machine several times. The whole process is quite straightforward: First, drive the car to normal operating temperature, letting the engine warm up for about 15 minutes to thin out the old fluid for better flow. Then pop the hood and locate the two hoses connecting the transmission to the radiator - typically one is the inlet line and the other the return line. After disconnecting the original connections, attach the flushing machine's input hose to the transmission's inlet port and the output hose to the return port direction. Start the machine, and it will automatically pump in new fluid while pushing out the old fluid into a waste oil container. Monitor the waste fluid's color change - when it transitions from murky black to relatively clear, you're nearly done. The entire process takes about 20-30 minutes, ensuring over 90% of old fluid residues and debris are thoroughly flushed out. This method is far superior to just draining through the plug, making the transmission operate smoother and last longer. After completion, reconnect the hoses properly, don't forget to check the fluid level, and take a test drive to verify smooth gear shifts.
