I have this video on my computer, and it's rigged as can be.
Look how low the Chevy sits in teh back, I bet it's got a 8'x4'x2" steel plate in the bed, and is in 4wd. Supposedly what I heard was the Dodge broke an input shaft on the Auto transmission.
Anyway, if you've got traction, the ultra low 1st gear in the Allision will outpull any of the other Auto's out there to 15MPH.
Merrick