Question for Jeep owners (mechanics) what caused your stalling problem?

This is a question for Jeep Cherokee owners (or mechanics that know of the vehicle). My Jeep was overheating the previous owner thought it was the heads. There was no oil in the water or visa versa, the compression was good and it wasn’t dumping steam or water from the tail pipe so I figured it had to be something else. I changed the thermostat and determined it was the water pump. So I put in a new water pump. Then the Jeep which ran OK started running crappy, no power, rough idling, then it started stalling when you let off the gas. Took it to a garage to have them pull the codes on it and it came up with a P0743, which is the torque converter clutch circuit. The mechanic says more than likely the engine when off the gas is being lugged down because the clutch won’t unlock. I spoke to another mechanic friend who specialized in transmissions and raced cars he believed it was the Crank Positioning sensor located at the front of the engine near the water pump. He believes the leaking water pump or parts of the gasket when I changed it is fouling out the sensor causing it to give wrong readings to the PCM (just give me back my ’73 Carona wagon, forget all this “brain” stuff). If you ever owned a Jeep and had a bad stalling problem what was your cause? And would you go with torque converter clutch circuit or CPS? I am tired of wallet bombing this vehicle next will be actual bombing. People tell me Jeeps are robust dependable vehicles but I am not feeling it.