Power steering

RR,

There is supposed to be a system in the power steering pump that makes it behave pretty much the same throughout the engine's operating band. I suspect that it is non-functional. Start by telling the service person that the power steering is not working well when the engine is at parking lot speed. That will get them pointed in the right direction.

If he says "They all do that." Then get a factory representative to try it out.

Matt

I would call a Ford truck dealer shop. This could be a serious issue.
Another thought, air in the system. Could try to look up how to purge steering system. On some systems, you need to remove weight from the front end, turn steering wheel all the way to one direction and hold. Then turn the wheel all the way the other dierction and hold.
Bleeding
Verify that you have or have not electric steering!

enblethen wrote:
This on 2019?
Could be alignment.

New motorhome. Had it weighed, tire pressure adjusted to the weight and an alignment done within the last month. I know it's the power steering because at idle, sitting still, it is difficult to turn the steering wheel. As soon as I increase the RPMs, it is much easier to turn the steering wheel.

This on 2019?
Could be alignment.

Low fluid, loose belt, low tire pressure,front end needs grease. A trip to a shop would be my next trip suggestion.