I changed on my Grand Marc and just pulled the Pitman arm. If you are lucky, after the arm is pulled, put an oil pan under the seal and start the truck while turning the steering wheel at the same time, you have about a 80%-90% chance of blowing the seal out with oil pressure. It was about a 15 min job for me because the trick of allowing the hydraulic pressure remove the seal worked for me. The truck may have a different gear box and may or may not work.
Jim