I have 35's and stock 3.73's and the truck drives and pulls awesome. The truck has no problem at all turning those tires, or burning them away. I do have some good power mods done to the truck, so that may have alot to do with it, but I dont ever seeing myself doing a gear set. I did a set of 4.10's in my old 86 chevy k-10 4x4, but thats because it was an offroad machine.