Slipping of the automatic transmission torque converter is a partial loss of rotation synchronization between the turbine and the torque converter pump.
Operating principle of the torque converter:
A torque converter is a device that transmits torque from the engine to the transmission. It consists of three main elements:
* A pump that is driven by the engine crankshaft.
* Turbine, which is connected to the input shaft of the gearbox.
* The stator, which is located between the pump and the turbine and changes the direction of fluid flow.
A fluid called transmission fluid (ATF) fills the torque converter. When the engine is running, the pump spins fluid, which then hits the turbine blades and causes it to rotate.
Slip:
Slipping occurs when the turbine cannot spin at the same speed as the pump. This can be caused by several factors, including:
* Insufficient ATF: If the ATF level is too low, the torque converter will not have enough fluid to produce the required torque.
* Friction lining wear: The friction linings in a torque converter can wear out over time, reducing their ability to transmit torque.
*Valve problems: The valves in the torque converter regulate the flow of ATF, and if they are faulty, it can cause slipping.
* Faulty pump or turbine: If the pump or turbine is damaged, it may not rotate properly, which will also cause slipping.
Signs of slippage:
*Power loss during acceleration:
* Gear slippage when shifting:
* Increased fuel consumption:
* Automatic transmission overheating:
* Kicks or jolts when shifting gears:
Consequences of slipping:
If slippage is not corrected, it can lead to serious damage to the automatic transmission, including friction lining failure and overheating. Vehicle performance and fuel economy may also be affected.
Diagnostics and repair:
To diagnose torque converter slippage, a mechanic will usually check the ATF level and condition, the condition of the friction linings and valves. Repairs may include replacing the ATF, repairing or replacing friction linings, valves, or the torque converter itself.