J.W. - Tinker's idea works the best, unless you havta, just havta, have another tool (like most of us!!). Use clear tubing, and a glass coke bottle (doesn't tip over as easy) to do it. When you do the rt. rear, angle your rt rear view mirror so you can watch the bubbles and fluid flow. This is also a great way to flush out your brake lines, as well. This should be performed every couple of years. The fluid will be rust colored until fresh fluid comes out.
Although Ralphs tool is great, I've seen less experienced personnel make a small mistake and have fluid all over the fenders and such.
Good luck!