Final answer:
Typically, the oil pump in an automatic transmission is mounted at the front of the transmission, where it circulates transmission fluid under pressure.
Step-by-step explanation:
The location of the oil pump in a transmission system can vary depending on the design of the vehicle and the type of transmission. However, typically in an automatic transmission, the oil pump is mounted at the front of the transmission. This pump is crucial as it circulates transmission fluid under pressure to the various parts of the transmission and torque converter.