im surprised im first to ask this, but why do you want a new tranny? is yours going, or you want to upgrade? make sure you check if the tranny is any different b/c i think the tranny for some 3 series and the m3 are the exact same ones.. soo
and yeah, the carfax showing a clean title, be very, very, very skeptical
there should be a number on the tranny, like Getrag something, i cant remember if its a sticker or not(i dont think it is)
but the way this is going, i would ditch it