The manual shift transfer case option for all 2003-2012.5 Dodge Ram 2500, Ram 3500 and 2008-2012.5 Ram 4500, Ram 5500 4x4 trucks is a NV271D. When Dodge first started using the NV271D, 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 NV271D was shorthand for New Venture 271 Dodge.) 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 NV271D at the New Process factory. After a couple of years, Chrysler sold the New Process production rights to Canada's Magna Corporation. Under Magna, NV271D transfer cases were still built at the NPG plant until 2010 to 2011 when Magna phased out the NPG factory and moved transfer case production to Mexico. The important thing to know is despite all these name changes and plant relocations, most of the parts in a 2003 NV271D are pretty much the same as a 2012 NV271D if they have the same base assembly number.
If the first digit of your transfer case assembly number begins with a R instead of a 5, your transfer case is rebuilt replacement unit.
