How do you change the trans axle fluid in a 1998 Elantra automatic?

Remove the drain bolt from the bottom of the transmission pan and allow the fluid to drain.

Remove the pan and remove/replace the filter

Replace the pan and drain bolt

USE ONLY the fluid specified by Hundai, available at your local dealership. Using the wrong ATF ***WILL*** damage your transmission, and eventually destroy it.

Refill the fluid through the dipstick tube.

Note that about half the ATF will still be in the torque converter.