Slip rate of automatic transmission torque converter
Torque converter slip in an automatic transmission is measured as a percentage and indicates the difference between the rotation speed of the turbine wheel and the rotation speed of the pump wheel.
In a new or refurbished automatic transmission, normal slippage is approximately 10-15%.
Permissible slip limits:
* Up to 20% during cold starts and when driving at low speeds in high gears.
* Up to 15% when driving the vehicle under normal conditions.
Causes of excessive slippage:
* Worn or damaged torque converter friction linings.
* Clogged or contaminated transmission fluid.
* Problems with automatic transmission valves or solenoids.
* Reduced transmission fluid level.
Consequences of excessive slippage:
* Increased fuel consumption.
* Reduced automatic transmission performance.
* Increased wear on the transmission.
* Automatic transmission overheating.
Important:
Torque converter slippage of more than 20% requires checking and repairing the automatic transmission. If the slippage is too high, it can cause serious problems and shorten the life of the transmission.