Do u have to drop to change front seal in a 2001 focus?

My was sticking in second or sometimes sliping and I notice it was leaking trn fluid from little. Hole where trans and engine meet by tork converter only thing I can think is front seal but I have only worked on rwd cars/trucks never a fwd and ii was needing to know if I have to drop whole trans or could change without droping whole trans and holw hard will it be compared to rwd and/or how mutch would shop charge????