The Jeep CJ5 and DJ5 have similar designs and parts, but their intended functions differentiate them. The Jeep CJ5, which resembled a military vehicle, was converted to civilian usage and served as a versatile off-road vehicle. It had a variety of engine options, including the V8 and in-line four, as well as automatic and manual transmissions. In contrast, the Jeep DJ5 was designed expressly for postal service deliveries in the United States, with an automatic transmission to meet the needs of delivery drivers.