Nope, I don't think they have ever had a problem with the ford input shafts....until I came along of course. Can't blame the tranny though, I may have abused it a little in the trailer tow comp at DPC!! Barry showed me all their stuff they put in the tranny and the clutch packs all looked like new still. NADP sure makes a tough tranny!!! I just broke/bent the Ford parts in the tranny. Even their torque looks like it was fine, I just mangled some of the ford stuff internally.
Tyler