for 1984, the popular i6 was optional in place of the amc i4. the four-cylinder engine was installed in only 147 eagles, but this still allowed amc to advertise its fuel economy of city and highway with the four-speed transmission and with the five-speed on the highway. the select drive system was redesigned to allow shift on the fly. (prior model-year eagles required two hands to operate the shifting switch, making it difficult, if not impossible, to change while the car was in motion.)