Two technicians are discussing automatic transmissions. Technician A says as engine vacuum increases, the vacuum moves the modulator valve to expose the exhaust port and reduces the amount of modulated pressure. Technician B says when there is no vacuum to the vacuum modulator valve, a spring moves the valve to increase 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

Technician A is correct because increased engine vacuum moves the modulator valve to reduce modulated pressure. Technician B is correct because without vacuum, the spring increases modulator pressure.

Two Technicians Are Discussing Automatic Transmissions