Don't use 4X4 on a paved road. If wheels are on a hard surface, and if wheels cannot spin, you will break internal gear wheels!
Use your 4x4 on non-paved roads. A wet asphalt road is fine if you want to make a turn but avoid as much as you can. On the other hand, you can use 4x4 on a dry paved road ONLY if you are going straight.