C4 - Leaking at Speedo Cable connetion.
 

Help! Have a C4 backing up a 302 in my '54 F100. I am parked forward on my driveway, which has a slight slope to it, and tranny fluid is pouring out where the speedometer cable connects to the transmission. I know it is probably and easy fix, I just need to know what to do. Can someone give me a direction? Please?