This is from one of my threads edited for your application:
Changing the Yoke and seal:
You will need a large socket to fit the nut, breaker bar, cheater for breaker bar, 16 inch or larger pipe wrench, cheater for the pipe wrench, steering wheel puller. some all thread the same size of the bolts in the yoke, washers and nuts to match.
First you need to break the torque of the nut holding the yoke on. these things are torqued down above 180 pounds or more! So get a buddy to help hold the pipe wrench. Simple procedure is attempt to break the torque on the nut using the socket/breaker bar/cheater while your buddy holds the yoke using the pipe wrench/cheater combo. You might have to get a second buddy to hold the axle stable while doing this.
Once you get the nut off, set it aside. thread the all thread into the yoke exact opposite of each other. set up you steering wheel puller and the all thread with the nuts and washers. when you have it snugged up, check to make sure you are evenly set up. don't have 1.5 inches of allthread before the puller and 1.25 on the other side. You want this as even as possible and the yoke will slide right off no problem. trust me. take an additional 15 minutes to set this up perfect or you will be in a battle lasting all day You cannot bind this yoke off!
You can rent a steering wheel puller from kragen, checker, autozone, and get 100% refund when you return the tool.
Use a dead blow(Rubber Mallet) and hit the pinion gear on the thread end to the rear of the axle.
