It's a double seal, there are two seals in there. Easiest way I found was to remove the pitman arm, remove the snap ring, then start the engine for just a second. Oh, be sure and put a big drain pan under the steering box, you will know why when you forget. Make sure all the seal parts came out. Be sure and put the two seals in correct order. They should be right as packaged. Be sure to seat the snap ring and don't use the old one, use a new snap ring.