This guy has a pretty good series on the Saginaw box too
Agreed Dean...a couple box specific tools would help as well. I figured I would take a shot at a 28$ kit, instead of a $200+ rebuilt box. I’m not sure where you could source a new sector shaft and piston, or other hard parts if needed. One video I watched, the guy bores the sector shaft and installs a bushing and burnishes it before installing a new bearing....that was for the Dodge boxes, he says the Cummins weight is hard on them.