The SuperTow 4 carriage lift kit can alleviate failure to load situations in many cases especially with heavy aircraft, or nose gear heavy aircraft. Symptoms are scarred carriage roller, and tug breaking traction during failed load attempt. Our experience has proven that this failure is counter intuitive and the roller needs to be higher in some cases as the weight of the aircraft is forcing the tug into the ground. In conjunction with this kit please verify your tug's tires are inflated to rating on the sidewall