Ford calls for transmission and filter change at 30,000 miles. I have a 2007 model E-450 with the V-10. First change I had a local shop do at 27,000. At 47,000 (20,000 miles) I did it myself. Since I did not change the fluid in the torque converter I plan to change it after 20,000 more miles. The early change also should help with extreme service such as towing. It took 11 quarts to fill it up after changing. Try to measure what you get out and start with that going back. I will take more than you measure due to spillage and fluid in the filters.
The original change on mine was by a Ford truck shop and they used Mercon LV fluid. I went to another dealer when I did mine and they also specified Mercon LV. Reading on the Ford forum, that is correct as the SP has been discontinued.
You have two filters. The one shown in your picture and a more conventional on inside the transmission pan. Naturally I would change both.
I hope this helps and answers your questions.
Earl
