The manual shift transfer case option for all 1999-2010 Ford Super Duty® F-250, F-350, F450, F550 4x4 trucks is a NV271F. When Ford first started using the NV271F, it was built at the Chrysler owned New Process Gear Plant (NPG) in East Syracuse, New York which was then operated by New Venture Gear (NVG) a joint venture controlled by Chrysler and General Motors. (The model designation NV271F was shorthand for New Venture 271 Ford.) The case castings usually had the New Venture Logo, but the assembly tag had the New Process Name. When NVG dissolved a short time later, Chrysler continued building the NV271F for Ford at the New Process factory. After a couple of years, Chrysler sold the New Process production rights to Canada's Magna Corporation. Under Magna, NV271F transfer cases were still built at the NPG plant through the end of the 2010 model year. In 2010-2011 Magna phased out the Syracuse NPG factory and moved transfer case production to Mexico so new replacement assemblies are now imported. The important thing to know is despite all these name changes and plant relocations, most of the parts in a NV271F are pretty much the same from 1999-2010.
