How does a lock-up converter obtain lock-up?
A) A one-way clutch locks the turbine and impeller at a certain rpm
B) The stator starts to free-wheel, locking the two parts together
C) The turbine rotates backwards locking it to the input shaft
D) A large piston is pressed against the front housing of the torque converter

Question

Quizplus · Accepted Answer

A lock-up converter uses a large piston that is pressed against the front housing of the torque converter to lock the turbine and impeller together, eliminating slip and improving efficiency.

How Does a Lock-Up Converter Obtain Lock-Up