For Ford, they have used 6 lug since 2004 IIRC. Ford had a 7 lug wheel for heavy payload models. GM switched to 6 lug for the 1/2 tons trucks in 1999 and continue to this day. IIRC, all 3/4 and 1 ton Ford, GM, and Dodge/Ram have 8 lugs. Toyota continues to use 5 lugs to this day on the Tundra.