What I wonder is if the second rear axle is a live axle or not... years ago my dad had an old (60s vintage) Ford Econoline van that he converted to a camper... He found a 6 cyl Mustang motor and tranny and put them both in, with the original tranny behind that... essentially a 9 speed with 2 reverses... when you put the thing in 1st/1st, the thing was geared so low it could climb a telephone pole if it could hang on.
Anyway, he talked to me one time about putting another axle behind the rear axle on the "Whoopie" (that's what he called all of his multi-function rigs). Some of the old Ford axles apparently had a front cover with the pinion shaft, and a rear cover with the same bolt pattern--he planned to put another front cover on the rear and run the axle off of it, but dad was real handy that way... I wish I could have spent more time around him... mom and he split up when I was 5, and I only got to see him every few months (he drove a "bed-bug hauler" for several years before retiring).
Anyway, on the Dodge, someone obviously had a lot more time, money, AND skill than I have.
Edited by Utah Smitty, November 28, 2015 - 10:06 PM.