That transmission looks like a fun project. The guts in the planetary section look just like an old 966C or so but the main case is very different. Probably most of the same kind of parts just stacked together a little different. Wild guess, probably way off, but is that out of a scraper?
Best thing to have on the Cat transmissions jobs was lots of room to spread things out and keep some order to them. Always liked having the boss come in when the last part came off and gears and clutches spread out over three benches. They always had a glazed over look on their face trying to figure out if it was ever going back together and actually work.
I did a D7 thirty years ago, G or H not sure... I know what you mean about the "deere in the headlights" look the boss got when he saw that long pile of bits and pieces all laid out! I remember he said "Wow! I've never seen one all apart like that before!" I couldn't resist and promptly responded in a quiet voice "Umm, neither have I..." I don't think he slept too well until the old girl was pushing dollars around again, lol :tong
cccccI am no expert but there looks to be a few gears missing from the picture that need roping in to the case as you lift out? did you remove the scavenge pump before removing the case, it's always best to remove both oil
coolers to clean out the water side.
Not an expert? Then no one is! Yes I removed everything that would come out in between the trans and torque. I had a little interference between those missing gears and a couple studs on the bell house so the gear came out before I continued lifting. I only removed one cooler, I can't take another trip until it's ready to reinstall so the engine cooler will get a field cleaning.
TC I will PM you some damage pics for reusabilty ideas. Usually these are totally junk when I take them out. This one was removed upon failure before it grenaded!.......tio