The easiest way involves dropping the subframe, engine and Transmission as a unit out of the car then separating the transmission and engine just so you can get to the seal. That being said, how bad of a leak are we talking about here?
1997 Taurus GL - 3.0 OHV - The Project Bull
1998 Taurus SE - 3.0 OHV - SOLD
1997 Taurus GL - 3.0 OHV - SOLD
Check to be sure the tranny vent on the top of the tranny isnt plugged before you pull the tranny.
05 Taurus SEL Duratec - my daily driver
04 Taurus SES Duratec - wifes car - TOTALED
06 Taurus SE Vulcan - wifes new ride
95 Taurus GL Vulcan winter car
Toy #1 - 86 Tbird 5.0 (original owner) - LOTS of mods
Toy #2 - 88 Tbird Turbo Coupe - LOTS of mods
67 Honda 450 Super Sport - completely customized