What A-833 is this?

66340SEDAN said

I thought the Plymouth Feather Duster and Dodge Dart Lite models all had an aluminum overdrive to save weight for better fuel mileage?

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Every 75 and 76 OD I have ever had were cast iron. I was under the impression they only made cast iron in those years. I did have an aluminum unit but it was a 1978. So I would say they were cast.