jeeps used to move rail road cars during tests in Brisbane Australia, 1943, to see if a Jeep would be able to work as a train engine in New Guinea

they found that a jeep could pull 20,000 pounds

http://www.bonzle.com/c/a?a=pic&fn=0ykfv3y4&s=3
http://www.nevingtonwarmuseum.com/usa---railway-jeeps.html
https://commons.wikimedia.org/wiki/File:Jeep_Switch_Engine_with_flatbed_trailer_(frontal_view).jpg