This sounds like tractor mechanic logic. Show me the physics, data, and calculations that you did to prove your theory. The engineers at Ford had access to multi-million dollar testing facilities and spent millions more determining how their systems work best. Do you have the same or is this just something that a neighbor told you? Please don't confuse people with anecdotal evidence based on backyard conversations. Power steering systems are self bleeding and the pressures present are more than enough to push any air up into the reservoir and bleed it out. The wheels are up in the air to make it easier for the user to move the system with the steering wheel and not stress a system that might not be lubricated properly after replacing a component. You don't need any "resistant back pressure", whatever that is, to do that. Do you really think that a few extra newtons of friction force is going to make a demonstrable difference relative to the 1000 PSI of pressure the pump is producing?

Follow the Ford procedure or the one produced by companies that actually test their components over and over again so they can provide you with a warrantable part.

 

My 1st repair on my 1st car was at 15, shade tree yes. 53 years later im still doing the repairs that work without spending thousands on tech smarts as you mentioned and by the way where is your degree from? And also i guess you love your truck/car replaced with updated plastic items!

 

Title has "RESOLVED" so what was the fix?
Last I seen the OP post was a re-bleeding over 2 days did not help and tried to call but closed for the holiday till Monday.
Dave ----

 

Georgia Tech. 20 years of experience as an automotive engineer at GM and Chrysler. Continue with the witchdoctor stuff if it works for
you, just keep it to yourself and don’t spread the disease.

 

Ok so glad to see you got the problem resolved. So let us put an end to the building side show please.

 

Or is it
I went back over the 2 pages and I did not see where he fixed it.
Last posted was he did a 2 day bleed and it was still doing the "shake & shimmy" and support was closed so he was thinking of putting the old valve back in place as he did not know what else to do.
So did he install the old valve and that fixed it or ........
Dave ----

 

Sounds fixed to me, yes he has his old crusty valve back on the truck, but he has perfect steering.

 

If you don’t want it to be so old and crusty anymore send it off to a place like Midwest Steering. They can rebuild it for you. Although I would also understand leaving it the way it is since you dodged a bullet and got it working again.

https://www.midweststeering.com/repairs/