The Dana 20 is found in 1963-1979 Jeep CJ-5, Jeep CJ-6, Jeep CJ-7, Jeepster C-101, Jeep Commando C-104, Jeep J-Series Truck and Jeep SJ Wagoneers. It's design was outstanding and remains one of the strongest and most refined of all the popular transfer cases. This transfer case is compact, light, durable, simple to build and capable. It features dual modes (2wd + 4wd) and dual ranges (Hi + Lo). The high range is direct drive (1:1) and the low range is 2.0:1.
The Dana 300 is found in 1980-1986 Jeep vehicles. It is one of the most respected transfer cases and is regarded as the gold standard by casual Jeepers up through the enthusiasts. While only provided in 1/4 Ton rated Jeeps, it strength surpasses this duty. The Dana 300 contains the culmination of what Dana learned about transfer cases since building the 300's predecessors - the Dana 18 since 1941 and then the Dana 20 since 1962.