Thanks! The TLDR seems to be that there's an input turbine and an output turbine. (I probably should've seen that coming.) The modern replacement, torque conve

Thanks! The TLDR seems to be that there's an input turbine and an output turbine. (I probably should've seen that coming.) The modern replacement, torque converters, seem to be essentially the same but with some magical modification of fluid flow in the middle: https://en.wikipedia.org/wiki/Torque_converter https://en.wikipedia.org/wiki/Torque_converter