One problem related to front suspension leaf spring has been reported for the 1999 Ford F-250. The most recently reported issues are listed below.
Today took the Ford 1999, 250 sd crew-cab to my mechanic, a funny noise, like metal to metal in the front area of the suspension. . . Sometime not all the time, tech does not knows what it is, guessed is related to the leaf spring wornout bushings. . . Plus sway bars end tips. . . Told me that few parts had to be changed. . And even so, he did not assured me that the noise will disappeared. . . . It's been a very good truck, only oil, brakes, batteries, etc. What a dilemma ???.