i have a big problem on my hands

ok guys i need some help... i know its kinda off topic but i have a 95 taurus with a regular 3.0L... i had been leaking oil so i changed my oil pan gasket last week... went find didnt leak. then this week i had a tranny cooling line rust out quick fix with a rubber hose and some clamps... tranny didnt leak after that now all of a sudden my transmission is leaking bad like a none stop drip coming out of where the oil pan bolts up and there is a metal shield on the shalow end of the pan... this shield got a little bent going back in and makes a rattleing noise... the tranny fuild is leaking from there bad

how much of a job would that be??? would some type of tansmission leak stop fix my problem

well i probally could do it myself in my shop at school but this car isnt really worth much money so idk if it would be worth it... how much of a job to get one of these trannys out.. is it easier to take the motor with it??