We should have the same setup with the 4.0. The block drain is on the drivers side about half way. It is accessible with a socket from underneath. It is hard to see or, but once you get a wrench on it it should be no problem. I should mention that it needs a square male socket to remove. I had trouble finding one, but they do exist at some parts stores or online tool places like harborfreight tools. I think it is a 5/16". Just a little too small for a 3/8" socket. Put a little teflon tape on it when reinstalling to seal and make sure it will not sieze on there for next time. Good Luck!