Torque converter automatic transmission Subaru Outback
The torque converter is an integral part of an automatic transmission (AT) and serves to transmit torque from the engine to the gearbox and ensure smooth gear shifting. The Subaru Outback automatic transmission uses a lock-up torque converter.
Working principle:
The torque converter consists of three main components:
* Pump: Attached to the engine crankshaft and rotates with it.
* Turbine: Connected to the gearbox shaft.
* Reactor: Located between the pump and the turbine and is designed to change the flow of fluid.
When the engine is running, the pump rotates, creating centrifugal force that pumps transmission fluid to the turbine. The liquid leaves the turbine and hits the reactor, which changes the direction of flow and returns the liquid to the pump.
This process creates a circulation of fluid that transfers torque from the engine to the gearbox. The ratio of pump and turbine speeds determines the amount of torque transmitted.
Torque converter lock:
At certain speeds and loads, the torque converter lock-up engages, connecting the pump directly to the turbine, eliminating energy loss and improving drivetrain efficiency.
Advantages:
*Smooth shifting and improved handling
* Increased torque transmission at low speeds
* Increased fuel efficiency by reducing energy losses in the torque converter
*Additional transmission fluid cooling
Service:
The torque converter usually requires minimal maintenance, but the transmission fluid should be checked regularly and replaced if necessary according to the manufacturer’s recommendations.
If the torque converter fails, you may experience symptoms such as slipping, vibration, or noise when shifting gears. In such cases, it is necessary to contact a qualified mechanic for diagnosis and repair.