its an 97 ,the reason i ask is some sites state 97 was a change to the 4r/100. the person i am working with i think someone had to tell him( its a truck)
97 was the last year for an E40D in the F250/350/SD series - Last of the OBS Fords - The C6 was my favorite, Took longer to get going and didn't have the extra gear But, held up alot better.