how do I change the fluid in a automatic transaxle of a 2003 hyundai elantra

Here's a long thread on changing the transmission fluid in a '99 Elantra, auto56: http://groups.google.com/group/alt.autos.hyundai/browse_thread/thread/f62ef9a2ac9e9f37/b6c5e9b7683f67c2%23b6c5e9b7683f67c2. Hope that helps!

It is very simple actually. It is the big 24mm bolt directly to the middle.bottom of the transaxle. If you have a filter for the transmission, it would be on the top of the transmission, and it resembles an ordinary oil filter, except it is written "A/T only" on it. When refilling the transaxle, use ONLY certified Hyundai Automatic Transmission oil. Using other types of oils can damage the transaxle.