I know what you mean on the use of the ATF and I assumed the same until this time on our 2013 unit. When I called them they told me to check the color of the fluid in the reservoir and if it was the tan color to only use hydraulic fluid. I guess this will be one of the questions that I'll be brining up this year at the MOC Fall Rally in Goshen. We'll see what they have to say this time.