Not sure what you're looking at, but the 2011 eco has electric steering and no fluids at all. I would suspect an issue with the entire EPAS rack or with the u-joints in the half shaft between the steering wheel at the rack.
https://www.motortrend.com/news/its-...steering-8799/It's Electric: 2011 Ford F-150 Adopts Electric Power Steering. ... Specialty models equipped with the 6.2-liter V-8, including the 2011 SVT Raptor and the 2011 Harley-Davidson F-150, will continue to utilize hydraulic power steering, as will Ford's heavy-duty Super Duty pickup line.