Most transmissions regulate pressure at approximately:

The correct answer is based on the typical operating pressure in many automatic transmissions. Transmissions generally regulate pressure to ensure proper operation of the hydraulic system, which is crucial for engaging the gears smoothly and efficiently. In most cases, this regulated pressure is observed to be around 60 psi.

This pressure allows adequate hydraulic force to engage clutches and bands, ensuring that the transmission can shift gears effectively and respond to changes in load and speed. Maintaining the correct pressure also helps with cooling and fluid circulation within the transmission, contributing to overall performance and longevity.

In contrast, the other options represent pressures that are generally less common for modern automatic transmissions. Pressures significantly lower than the standard may not provide sufficient force for effective engagement, while higher pressures can lead to increased wear or even damage to transmission components if not properly managed. Thus, 60 psi serves as a benchmark that aligns closely with the design specifications of many transmissions.