Fridge: you will need to replace the cooling unit, you may wish to replace the whole unit, I do not (yet) know how to remove them and the directions are somewhat rig-specific.
Tires: The tires do not say Max Pressure 110 PSI
They say somethign like Max Load 22,000 pounds at Max Pressure of 110 PSI.. IT is important to have the pressure match the load on the tire. RV Safety, Merritt Island, Florida
and make an appointment to have the rig weighed, they will tell you the proper pressure.. I can all but guarantee it won't be the pressure on the sticker, nor the one stamped in the sidewall.. Usually in between.
I see the switch question has been answered
Type "H" Transmission fluid is a FORD specification so try a FORD dealer. I did find a link to a "Universial" product
Lubrication Specialties, Inc.
but since all I know about it is a fraction of what's on the page linked to I can NOT recommend either for or against. I typed "Type H Transmission Fluid" without quotes into the Google search bar by the way and learned all I wished to know about it a few seconds later.