Tech Answer

What does a torque converter do?

A torque converter is a fluid pump of sorts. Inside the donut-shaped housing is an impeller, which is driven by the engine. The impeller's vanes create centrifugal force by pumping transmission fluid toward the outside of housing. The other key component inside a torque converter is the stator. It's located between the impeller (on the input side) and the turbine (on the output side). The stator incorporates a one-way clutch, which has the ability to redirect the fluid flow inside the converter. By redirecting fluid flow, the converter multiplies the torque produced by the engine enough to propel a vehicle down the road.

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