[Traylaw]

Can you cold weld this crack....nope. Cold welding is ok if you are tack some light gauge metal but cold welding has no penetration and no structural strength. A skilled welder can repair this crack almost as good as new by grinding out the weld so he can obtain good penetration through out the full thickness of the metal. And then probably install a threaded insert.
This is why God created torque wrenches so that us mere mortals wouldn't screw up aluminum cases. 🤣

 

[Traylaw]

OMG, he epoxied the drain plug in. When you mentioned "cold weld" I thought you were referring to the actual welding process called cold welding not an epoxy called cold weld. So I guess you're not planning on changing the trans fluid in the future. Never go back to this guy again for any service. Sorry but this is an abortion gone bad.