[1retired06]

On my 2005 6.0 I had an external trans filter (spin-on). However when I had my transmission serviced at two different ford dealerships, they did not drop the pan, but flushed out all the fluid, to include the converter, with an external machine that somehow forced out all the fluid. The flushes, with external filter changes ran somewhere in the neigborhood of $270-290 including fluid. Ran the truck until I bought the 2011, and never had any transmission issues, so whatever they did, kept the transmission in great shape. If I remember correctly, I had it serviced every 30,000 Miles.