The NV271 and NV273 family of transfer cases were designed and developed by New Venture Gear (NVG) for the new 1999 Ford light duty trucks with requirements to withstand severe duty off-road use. Heavy payloads accompanied by gross vehicle weights of 7938 kilograms (17,500 lbs.) are now possible. The new family of mechanical shift and electric shift transfer cases is designed to be durable under varied terrain, climates and engine displacements ranging from 5.4 to 7.3 liters. An emphasis has been placed upon high strength and long-term durability without exceeding the customer weight target of 54 kilograms (119 lbs.).