Go for a 5-10 mile drive before you drain, to get as much gunk in suspension as possible...also drains better when warmed up.

As mentioned earlier, the lowest bolt that fastens the front third member is used as the drain...bring a coat hanger under there with you, it'll most likely be clogged.

Look at which side the rear drain hole is on & jack up the other side of the axle a few inches, if you want to drain out the most old stuff possible.

Most gear lubes come in a bottle with a longer tip, so you can squeez them into the fill hole, even though it's on a verticle plane.