Im really having problems finding a new tranny I can swap in place of my AOD out of a 1990 mustang. I dont kno what kind of transmision I want. one that will hold at least 500 hp but is around 1g to buy. I think I want to get a three speed auto but I dont kno if I have to do any modifications to make it fit. Someone please give me some advice.

 

get a red neck performance c4 should hold up way higher then 500 hp n they are around 1200 going from an aod to a c4 doesnt require any mods maybe a different drive shaft