I have never heard the AMC 20 referred to as a great tough axle. :huh???: A 78/79 Ford hp60, a Gm corporate ff 14 bolt, are "great, tough axles." The 20 has a notoriously weak and flexible housing. But to each their own, I'm sure the 20 is sufficient if you run a small enough tire. In my 20 years of offroading, i've never once heard of the 20 as a great, tough axle. I know the ring and pinion are beefy, I also know the cj units with the 2 piece shafts are less desirable and more weak than the waggy units. Hell, I had a amc 20 under a cj-7, it held up just find with the 4 cylinder... :D But that sure as hell wouldnt be my axle of choice behind an LT1. :hmm:
Some more amc 20 info, http://www.jpmagazine.com/techarticles/ ... ndex1.html , my favorite line in that one, "the amc 20 is marginal in a stock application.
And some amc 20 tech, also describing its tendency to flex, http://www.jpmagazine.com/techarticles/ ... index.html .
Great and tough, i don't think so. Adequate for a smallish tire, semi trailed rig, absolutely.
Seems you are mis-informed. The AMC20 axles are great, tough axles. The CJ versions were weak until the one piece conversion was done, but then they can easily handle the power of a big V-8. The Waggy 20 is definitley the best of them with the strongest housing and one piece stock.
