What car are you talking about. I know that the tranny from an e36 M50 will fit onto the M50 in an E34. I know that you can ship a manual tranny for about $70 via UPS, just sent one out last week actually, Just make sure you reinforce the hell out of the box, and you drain the fluid. As for automatic, depends on how much they weigh, you can send up to 150lbs via UPS