2001 Ford ZX2 motor transmission strain, now leaking antifreeze?

At first we wondered why it was starting to sound like it wasn't changing gears properly. Yesterday, I saw that under the front center of the car, it had a very fast drip of antifreeze. As far as I know, the water pump has been replaced twice over the past 2-3 years. Unless it is running on top of a guard and going over to the middle, what else could it be? Yesterday afternoon it had a heavy drip. As of last night, it magically stopped and the overflow tank that we thought would be empty was still as full as when I filled it up yesterday afternoon. What gives?
Added (1). Transmission was rebuilt just about a year ago with no issues. Starting to wonder if that isn't related to what is going on now. Transmission fluid was serviced at that time and is full and clean.

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