Torque converter not IWE?

So, I was dealing with that dreaded IWE noise. I changed the solenoid, check valve, and vacuum tested the lines, but the sound persisted. Then, I replaced the actuators and the bearing hub, but that didn’t help either. I have all the symptoms of a bad IWE, but despite all the new parts, I still get intermittent noise under load.

I consulted a Ford mechanic who suggested it might be the torque converter. I told him I don’t experience any shudder, power loss, or error codes—no other symptoms of a torque converter issue. He wants to charge $200 for a diagnostic. Is there anything else I can check or any other suggestions?

Since the IWE noise persists despite all the repairs, it’s possible that the mechanic’s suggestion about the torque converter is worth investigating.