A vehicle modification package designed to transform a two-wheel-drive vehicle into a four-wheel-drive vehicle typically includes all necessary mechanical components such as a transfer case, axles, driveshafts, and other related hardware. For instance, a pickup truck originally manufactured with power delivered only to the rear wheels can be upgraded to power all four wheels using such a package.
Enhanced traction in challenging terrains like snow, mud, or sand represents a significant advantage provided by such upgrades. This capability increases vehicle versatility, allowing access to remote areas and improving performance in off-road conditions. Historically, these modifications were primarily sought after by off-road enthusiasts and those living in rural areas. However, increasing demand for adventure-oriented vehicles has broadened their appeal to a wider consumer base.