The Powertrax No-Slip Traction System works well on the front axle of 4WD vehicles provided a couple of important guidelines are followed. The Powertrax No-Slip Traction System should be used only on vehicles equipped with locking hubs on the front axle or with front axle disconnect. In addition, the vehicle must not be equipped with full time 4WD. Vehicles equipped with a Powertrax No-Slip Traction System on the front axle should not be operated on the highway with the front hubs locked and 4-wheel drive engaged. Following these guidelines will ensure very good on-road drivability while still providing maximum off-road traction.All Powertrax systems carry a 2-year manufacturer warranty on defects/workmanship.