.
There are folks that know more about that than I do, but with a hydraulic pump attached to the PTO that is attached to the transmission you can do a LOT of things. The pole trucks that service the power grid in your town and a hundred other of vehicles
with hydraulics can really
"do magic". A pair of lines plumbed to the front of your truck (one pressure, one return) with a quick connect can make things move with a push of a lever. Same to the back if you wanted or needed it...
Fire Trucks, Wreckers, Ambulance / Squad vehicles, Dump Trucks and a lot more. There are Jaws Of Life, Impact Wrenches, Chainsaws, run your Wood Splitter, and a lot of other things can be driven through a siamese hose attached to fluid power. A ball valve turns off that line when you aren't using it.
I hate to keep saying it, but
there is some magic in that there oil line!
- Don't know if I answered the question or not.
Need to know what kind of transmission (pictures) to be any more useful.