Hi, I am John Mc, a Ford dealer tech. I hope I can help you quickly and accurately. One moment while I work on your problem.
Give me a sec and I'll post instructions on how to replace the axle seals.
Is this a super duty or light duty?
First you have to remove the wheel hub. Then you can knock out the seal and knock in the new one with a hammer and a block of wood. Here are the instructions on removing the hub.Click here for instructions
If this answer has been helpful to you please help me by accepting. This is how I receive credit for helping you today!
Also if you need further assistance for this problem after accepting feel free to ask afollow up and I'll be glad to help.Thanks,John Mc