Kia Troubleshooting Questions? Ask a Mechanic
Hello I will help you with your question,
For that much fluid it should be in the cooler system. There are rubber hoses from the transmission cooler pipes to the cooler and those are up front. If you see it dripping just behind the bumper that should be what it is.
The other possibility is that a drive axle came out of the transmission. If that happens you should hear noise from the axle.
The cooler line is a few hundred to repair, the axle would be several hundred.
You will need to tow it to where it can be inspected and repaired it cannot be driven.
Please let me know how I can help