Hyundai Repair: 2004 Elantra GT transmission fluid change, 2004 hyundai elantra, transmission fluid change

Question
Can you give me a step-by-step procedure for change the transmission fluid and filter in a 2004 Hyundai Elantra GT?  I'm trying to get the car ready for a two-day road trip and the transmission fluid is pretty dark.  I seem to have found a drain plug on the bottom of the transmission, but I'm not sure where the filter is, or where I should add new fluid.

Thanks so much!

Answer
The 2004 Elantra doesn't have a serviceable transmission.  Go to your local dealer and get a transmission plug sealing washer and five quarts of SP-III transmission fluid.  Then simply remove the plug to drain the transmission, replace the sealing washer, reinstall the drain plug, and add the new fluid through the dipstick tube.