Were is the speed sensor located on the trasmission of a 2004 Kia sodna?

There are two sensors One is a speed input and the other is a speed output both are on top of the transmission the input is on the side of the motor and the other is on the wheel side. to get to them you need to take the motor cover off and the air filter box. they are in plain site after that. they look like two plastic things sitting on the transmission. Kia charges aprox. $300+ to change them. they are 86.00 each wholesale from a dealer. I do not know what is involved in changing them out. I am going to try next week. I will return to tell how if I figure out how.