Two technicians are discussing automatic transmissions. Technician A says on many hydraulically controlled transmissions, the modulator valve receives vacuum from the engine. Technician B says the vacuum modulator converts the engine vacuum signal into a hydraulic pressure called modulator pressure. Who is correct?
A) Technician A
B) Technician B
C) Both A and B
D) Neither A nor B

Question

Quizplus · Accepted Answer

Both Technician A and Technician B are correct. The modulator valve in many hydraulically controlled transmissions does receive vacuum from the engine, and the vacuum modulator does convert the engine vacuum signal into a hydraulic pressure known as modulator pressure.

Two Technicians Are Discussing Automatic Transmissions