as long as he wipes it out clean an dry it , and the fluid settles he will be fine i done this to honda/acura tranny about

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Quote Originally Posted by Init2winit
You can not weld that crack with any type of fluid leaking out. You'll have to take the trans out, turn it upside down, and then clean the crack so no oil residue is anywhere near it. When you heat it during a weld, it will draw the fluid out of the crack contaminating the weld.

As said, JB weld.