Light rod knock in a Durango 5.9... is it terminal?

Tried to do front band adjustment on the trans, adjusting screw went almost 1/8" into the case before it snugged up... looks like the transmission is FUBAR. I suppose I'll just put some additive and thicker oil in the engine, flush the brakes and be done with it for now. It's a nice coincidence the same place doing the machine work on my cylinder heads is also a transmission shop I'll just send her over there, I know the owner pretty well he *might* give her a bit of a discount if I explain her situation. I worked there for a month and the shop transmission guru could pull a truck transmission, strip it down, rebuilt it, and reinstall in about 4-6 hours... and he wasn't a hack either I watched and tried to learn as much as I could but it was tough to pick up on not having rebuilt an auto trans myself.

Oh yeah FYI stay away from late 2000s Ford Super Duties we did a ton of those LOL
Probably no material left and just metal band to drum.