Technician A says that spring tension against a spool valve regulates system pressure in a
hydraulically controlled transmission. Technician B says that a 50% pulse width modulation means
that the pressure regulator valve is closed 50% of the time. Who is correct?
a. Technician A
b. Technician B
c. Both Technician A and Technician B
d. Neither Technician Anor Technician B