Some quick help please

Lets see, mainshaft warped, sounds kinda iffy. I would believe the driveshaft is bent or twisted, but who knows. As far as rust and pitting, only if the transmission was sitting outside in the mud for like 20 years. Aren't those gears in an oil bath most of their life? Yeah another transmission for a core might be the way to go, get one that doesnt have too much damage inside. From what I have always understood, the A 833 is pretty heavy duty. There should be a good used one out there that would need minimal internals other than the usual wear items and seals. As always just my $.02