Try the easypose method.. you can manually build in easypose, but easypose underground over at RDNA makes it SO much faster that I would never do it by hand any more.

Play with a figure that has a tail with easypose built in, and you'll notice the movement is very "train turn" like.

There really isn;t any easy way yo do this, but using erc built in to turn the wheels, and easypose build in for the full train car manipulation will make in more manageable.

Way too many people take way too many things way too seriously.