TCM location

I have a 2000 Sonata 4cyl A/T that is reading a code 720. I have replaced the output speed sensor, checked the connection to the sensor, and the problem persists... According to the Hyundai service website, the next thing to replace is the TCM, but I can't find it... Does anyone have any ideas where it might be, or if this car has one? Any help would be greatly appreciated.
Thanks in advance...