what sort of car is it.if you got a craine you can do it on the floor.you jack the car up put on stands undo eng mouts with the crane drop the eng and gear box to the floor remove craine from eng find two hook ponts to lift the car up and side eng and gear box out. a basic front wheel drive car should take the average home mechanic a day from start to finish,
the only fram you have to undo is the one with the eng mounts on