Hola Enrique,tenes razon no podia faltar la info acerca de la T18 ,la responsable de producir traccion en las 4 ruedas
(Fuente ; Novak)
Dana Spicer Model 18 Transfer Case
The Dana 18 is found in 1940-1971 Jeep vehicles. It is also found in IH Scout trucks. It's production spanned 30 successful years, making it one of the most famous and reckognizable transfer cases of all time.
History
This is a difficult section to abbreviate, so hold on...
It is absolutely fair to say that the most important part of one of the most important vehicles of the last century is the transfer case. If World War II was won by the "Jeep", than it was won by the gearbox that gave the Jeep four-wheel-drive - the Dana Spicer 18.
The distinction of the invention of the first four-wheel-drive truck may go to the Brookford, Pennsylvania Twyford Company in 1905, though built only in extremely limited numbers. A Wisconsin company named Four-Wheel-Drive would later produce 4wd trucks for the US and UK armed forces for WWI. Marmon-Herrington later made 4wd conversions for Ford trucks and their own heavy commercial and military applications of 4wd technology. Before 1940, not Ford, nor GM nor Dodge had a production four-wheel-drive offering.
The Spicer corporation was founded in 1904 by Clarence Spicer and he was later joined by Charles Dana. The Dana Spicer Corporation was the premier supplier of automotive powertrain and chassis components through the largest part of the 20th century. Because of their rapport with Ford, Willys and Bantam (after all, Spicer u-joints and other components were in just about everything), chose them to build a successful prototype in the 49 days given by the US Department of War. It was only obvious. Willys and Ford followed suit in using Spicer as the supplier of the transfer cases and axles.
The first Dana 18's by Ford and Bantam were actually driver's side drop models. The Willys model was essentially identical but a passenger side drop, which would become the Jeep standard format until 1986.
Then arrived 1940. War was on in Europe and looming for the US. Forward thinking military brass rapidly comissioned the construction of a light utility vehicle. Bantam, Willys & Ford competed (listed in descending order of success and in ascending order of these companies' long-term economic success) for the contract.
Despite this break-neck, accelerated wartime development, the Dana Spicer 18 transfer case was a total success and a pivotal development in the history of the Jeep and all subsequent four-wheel drive trucks. The Willys MB and Ford GPW Jeeps were the first, full production four-wheel drive vehicles.
Identification
The Dana 18 is the only cast iron, offset drive (meaning that both front and rear driveshafts are in-line) transfer case found in production Jeeps. It has a passenger side rear output that is often coupled with a drum brake assembly. The front output is also on the passenger side.
por Diego » 05 Jul 2013, 17:52 
calculo que debe ser desde el principio 
. De ser asi es increible, se fabrico con poquisimas modificaciones hasta 1986, como dice el articulo.
