Re: 818T trans post-mortem
I have welded on good old cast iron as such with good success. If you clean it up and bevel the edges a bit . I pre heat the base metal and weld it with 7018 Rods,I know they are not cast iron rods but they have worked well for me for over 40 years welding rail cars . After welding it , I peen the welded piece a bit and heat it some more . Peen again and heat some more for a couple cycles of slowly cooling it. I have had success welding old cast iron water pumps with this technique ,and vises , and many other nothing to lose projects for folks to help them out . I would try repairing the case as it is not a heavily stressed area , it just broke from piece of gear tooth busting it out. I did use regular cast iron rods a few times when I had them available . But mostly 7018 rods running DCEP because that is what I had. Good Luck at whatever comes of it. I would weld it up for you if you were in my neighborhood ! I just like trying to save whatever I can from the scrap man.