2000 Chysler Grand Voyager Leak coming from Transmission

Transmission problem
2000 Chysler Grand Voyager V6 Two Wheel Drive Automatic 100345 miles

I have just found a Transmission leak coming from between the "I think is called" the control box that sets on top of the transmission the Trans houseing.

My questions is this repairable with a casket or changing the casket. With the fuild full the transmission sihts fine. If is repairable what type or price should I expect, or can I repair it.

Thanks.