As a side note to traany/t case combo's is one of the reasons the dana 18 t case is so popular is because of the Warn/Saturn
Overdrive unit. The Dana 18 is subject to extra wear because of the output location. But because of the location it has a PTO port, a common adaption is to put the
Overdrive unit in there and get double the option of available gears. plus, here comes that adapter word again, but they make an adapter so you can run both the PTO and the
Overdrive . Some of the legend of early jeeps was they had a PTO and could be used doing farm work, etc. The Dana 18 was upgraded in teh early 60s when Jeep released the first jeep with a v-6, they then released what is commonly called the super 18, it is the running gears of the 18, with a larger shaft, put into the
Dana 20 case. this way it could take the power of the v-6.
You will find a lot of early jeep fanatics that still run the D-18 case and love it. I keep one rebuilt as a spare and about every 3 years yank the old one and send it to be rebult, Of course I live in the rock crawling capitol of the nation with Johnson Valley just a hour from the house.