One problem related to transmission fluid leaking has been reported for the 2005 Ford F-350. The most recently reported issues are listed below.
Transmission fluid was leaking out from under truck after I started it to let warm up. Had it towed to the garage only to find out that a snap ring inside the transmission had worn a hole in the transmission casing. This could have been real bad if I had not let the truck warm up as I live on a hill and the transmission fluid was coming out so fast I am sure the road would have been covered. I check to see if Ford had recalled this problem but they did not, even as there are many complaints on the Ford forum website. All I can say is there will not be another Ford in my life after I replace this truck.