What are the external symptoms of deviations in the torque converter work?

1.     On cold oil and a warmed-up engine, when 2-> 3 and 3-> 4 are turned on, an indistinct and prolonged switching occurs
2.     floating speeds when driving at low speeds
3.     Abrupt inclusion 2-> 3, 3-> 4. in fact, this is a very late blocking with high switching pressure
4.     trembling from 40 to 80 km / h
5.     torque converter noise

What are the reasons for the failure of the torque converter?

•     Torque converter lock solenoid - repair or replacement
•     torque converter lock-up valve in the pump - replacement with a new or repair one
•     torque converter lock-up valve in the hydraulic unit - replacement with a new one
•     pump hub - replacing the oil seal and sleeve in the hub
•     oil seal and seal in the torque converter - torque converter repair
•     friction lining in the clutch - torque converter repair
•     antifreeze temperature (very low), brake pedal sensor

P0742 - TCC Torque Converter Solenoid Valve lock up in on position This error is recorded when trying to stall when braking.

P0741 - TCC Torque Converter Solenoid Lockin  Off position  This error is fixed when slipping or no lock.