How do you change transmission fluid on Hyundai Sonata year 2007?

You take it to a dealer or lube shop and have them pump out the old and replace with new fluid. The reason for this is that you want to replace all the fluid in the transmission and the torque converter at the same time. If you try to do it yourself you'll be left with fluid in the torque converter which will contaminate the new fluid. Costs anywhere from 125.00 to 165.00