well i replaced the transmission (a4ld) in my 91 mustang because it finally gave out. and i bought one from a junkyard with a torque converter. i didnt get a chance to look at the torque converter before my friend put it on the transmission and lifted it up onto the jack to line up with the engine block. but when i went to tighten the torque converter bolts on i noticed that there was only one bolt to screw the nut on. and when i turned the engine over i felt like 4 or 5 holes all directly next to eachother, then i looked at the old one and there were no holes on the torque converter and it had 4 studs instead of just one. i got the transmission in and everything is hooked up and it runs fine, but i was just wondering what is the deal?