Dodge four-wheel drives are identified by the W in the model code and VIN: serial plates to 1965, the thirteen-character VIN of 1966–80 and the seventeen-digit VIN since 1981 (1B7/1D7 Dodge, 1C6 Ram); military trucks by their M-designation and Army registration.
Serial plates to 1965, a thirteen-character VIN with W for four-wheel drive 1966–80, and seventeen-digit VINs under the Dodge and Ram WMIs from 1981; military trucks by M-designation.