Tranmission case

Maybe it's all in my head but why does one of my 1990 alltracs have a cast iron case and my other 90 alltrac has an aluminum case, maybe I imagined that the first tranny was cast iron (will double check) was there a break in the 90 year that they switched. I'm just really confused now.

Your are probably remembering incorrectly. They both should be aluminum.

You probably just think they are cast iron because they're so incredibly overweight

All E-series (all Toyota trannies that I know of) have cast aluminum cases and bellhousings. The E58 from the late-model Japanese 4A-GZE Corollas has the last third of the case (the outer cover) made of stamped steel. There might be a couple others like that, but I haven't seen any.

yeah used two different magnets when i was curious and the stronger magnet mated to the gearsets inside and tricked me into thinking it was cast iron.. well that and yeah the fact that they wiegh 5 times what a dsm tranny weighs!