I am familiar with the general workings of a torque converter. The engine-side blade pushes the fluid, the fluid spins the transmission-side blade. What I am all fuzzy about is, for lock-up torque converters, the tranny-side blade gets physically bonded to the engine-side blade above certain RPMs.
HOW does this happen? Is it a clutch-like friction thing? I've read different things in different places, so are there different implementations from different manufacturers?