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Forward Look Technical Discussions -> Transmission and Rear Axle	Message format

22mafeja

Posted 2022-02-26 3:15 AM (#619803)
Subject: Armasteel on Mopars

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Was armasteel cast iron ever used on mopar rear axles or yokes or was it a GM thing only?

mikes2nd

Posted 2022-02-26 9:23 AM (#619805 - in reply to #619803)
Subject: Re: Armasteel on Mopars

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its just a brand name and process for GM... went away...

Powerflite

Posted 2022-02-26 1:14 PM (#619816 - in reply to #619803)
Subject: Re: Armasteel on Mopars

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Very doubtful, for a couple of reasons.
1. It required a lengthy heat treatment to make - that translates directly into $$. As a result, car companies moved away from this material & method after the war, once nodular iron was invented; which just required the addition of other alloying elements without the expensive heat treatment.
2. It was a GM product, so other companies have a strong incentive to develop their own, better methods to avoid having to pay their competition.
3. I believe that axles can't be cast and must be forged in order to be strong enough to take the torque. GM used armasteel to make connecting rods & other parts in the old days, to save forging costs, but it wasn't a good tradeoff, as it made those critical parts excessively heavy. Forged connecting rods create a much lighter & better product.

22mafeja

Posted 2022-02-27 12:29 AM (#619838 - in reply to #619803)
Subject: RE: Armasteel on Mopars

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