When you listen to bearing noises from the transmission, Test the transmission fluid, and see if you can see steel parts In the transmission fluid. If you find metallic pieces, they are most likely from the faulty torque converter bearing. A lock-up torque converter features a designed-in locking clutch system. https://torque-converter-clutch41963.newsbloger.com/34607852/a-secret-weapon-for-torque-converter-clutch