have a 4.10 in my 54 1ton panel(235 with 6.50x7.50 12ply tires) , drive it back and forth from weatherford to ft.worth on I20-30 and have no prqblem driving at 65 and 70. there is one hill that requires driving in the right lane but,if i get a full head of steam up i can still be at 60 when i get to the top.

tony'n weatherford