Ford 4x4 Transfer Case Identification

IDN-402 Input Shaft Clutch Tooth Profiles for NPG and NVG Transfer CasesMost New Process and New Venture 2 Speed, Chain Drive Transfer Cases utilize a sliding Range Sleeve the engages with either clutch teeth in the back of the input shaft (high range)...

For parts identification purposes, a Round Tag is affixed to the back of the rear case. Stamped on the tag are the Model Number (ex: NV271D or MP271), Assembly Number (8 digit number plus two letters), Transfer Case Build Date, and Low Range...

Starting in the mid-1990s, most New Process and New Venture transfer cases factory applied Decal usually located on top of the front case on on the bottom edge of the rear housing. The Decal has a Bar Code, serial number, Dodge assembly part...

Magna 271 and 273 cases built in Mexico also have a build Tag, but is usually unpainted and just stamped with the Transfer Case ID numbers, but no other identification.