How do you change transmission fluid on 2006 Hyundai Elantra?

To change the Transmission Fluid on a 2006 Hyundai Elantra, start by raising the vehicle and securely supporting it on jack stands. Remove the transmission drain plug to let the old fluid drain completely into a pan. Once drained, replace the drain plug, refill the transmission with new fluid through the dipstick tube using a funnel, and ensure the fluid level is correct by checking the dipstick with the engine running. Dispose of the old fluid properly and check for leaks after the process.