Can not help you with the Ford Tranny. but tire pressure I can
There are two tire pressures all but guaranteed to be WRONG for your rig
One is on the sticker inside (it is the proper pressure for the rig.. EMPTY, of course the instant you step into the rig, it's wrong)
The other is stamped on the tire and most folks do not read it properly either, it does not say "max Pressure" it says "Max Load of XXXXX at max pressure of YY"
The proper pressure is found by going here http://www.rvsafety.com
and having them weigh the rig, they will then tell you what pressure to use in the tires (I edited the link Thanks RVdude, you beat me to it as I was checking to make sure and due to a slow connection it took a while)
Mine run 115 psi for the most part
NOTE: each wheel may be different (inner and outer tires are the same though)