Hardened Oil Pump Identification

CFD244 said
FWIW.....I took an OEM drive with the square transition point and mounted it in a vise. Laid a big *** pipe wrench on the gear and gave it a twist..... It took a **** load of torque before it snapped off. It seemed pretty sturdy.

Yes, but that was a one time incident, not loaded over a long period of time. You'd be surprised what hydraulics can do.