Wait a minute I'm mistaken. For several model years Ford used to use an external filter assembly that had to be disassembled and a paper filter cartridge replaced. The assembly is located as I posted. Not sure when Ford changed it but very different than the inline FT-185 filter.
When you drain the oil save every drop and measure how much you were able to collect so you can refill with the same amount. If you blow out the cooler and lines you should be able to remove 12 quarts. At least that is how much I can remove. You can not drain the torque converter without removing it so a driveway service is not a complete drain but about 3/4 drain and refill. For my 2006 chassis Ford recommends a 30K miles service for a class A but since I only do a partial drain and refill I drop to 20K miles or about every three years.
For a proper drain you need a flush machine that can heat to the oil to 160 degrees and pump the new in and old out. The transmission has a thermostat just like the engine cooling and unless you can get it to open you can't perform a complete exchange.
2006 Hurricane 31D built on a 2006 Ford F53