Hello. You don't have to pull the motor or transmission out, but you do have to remove the oil pan. You don't need any special tools. You will want to to take the idler arm loose so that you can drop the steering stuff down far enough for the oil pan to clear the crank shaft. While you are there you probably ought to go ahead and replace the oil pan gasket. The rear seal is part of the oil pan set anyway. Hope that helps.
Hi again. If you can hang on for a minute I'll go take some pictures. I've got a couple of new oil pan gasket sets hanging around somewhere, along with a readily available engine block and oil pan. Back in a minute.