(This is for us newbee's so if your a old salt juz hit the back button)
I dont know why I didnt try this sooner-http://www.superdutypsd.com/power_steering_flush.php
Super easy and yet another thing that I wonder why didnt the first owner ever do this. The whole job was done for under $20, from what my son sais the steering seem's to be smoother and this is one of those you cant screw up jobs. So make sure your kids is their with ya,a chance to look like you know something if you know what I mean.
Ill probably change it out again after the winter with some fancy stuff and forget about it (like the first owner).
Oh yea and no I didnt put the link above together,not trying to get credit for it. Juz thought I'd bring it to the new guys attention out their. This is a job that dosnt seem to get talked about to much!