How much does it cost to change a car from manual transmission to auto matic transmisson?

I had a friend who did it to his Honda Civic, but he had it done in a shop 'cause he didn't want to screw anything up, it cost him just over $2500 a couple years ago, it'd likely be more now. I have to ask why you'd do this though? I drive an '08 manual transmission Chevy Cobalt SS and I love the race-car feel driving a stick gives you :) I specifically ordered the manual for this reason.How much does it cost to change a car from manual transmission to auto matic transmisson?
It depends on the car but none are cheap. You'll need a flex plate, transmission, torque converter, shifter, ECU and wiring harness and rear transmission mount. Depending on the car you may also need a new bell housing, crossmember and driveshaft. Of course the final gears are ratioed for a manual and may not be right for an auto. You'll also need the proper hookup and driven gear for the speedometer. Easiest route, which is still expensive, is to buy a junker of the same year and model that is an auto so you'll have all the parts and can see how everything hooks up.