Oilers/Plant Tenders (HHC) Civil Service Practice Exam

What is the typical operating oil pressure range in a torque converter?

1. 15 to 20 psi

2. 25 to 30 psi

3. 35 to 40 psi

4. 45 to 50 psi

The correct answer is: 35 to 40 psi

The typical operating oil pressure range in a torque converter is indeed around 35 to 40 psi. This range is critical for the proper functioning of the torque converter, which plays a vital role in the transmission system of vehicles by allowing the engine to continue running while the vehicle is stationary and providing a fluid coupling between the engine and the transmission. At this pressure range, the torque converter is able to maintain hydraulic flow and pressure necessary for efficient transfer of power from the engine to the transmission. Adequate oil pressure also ensures that the torque converter can effectively engage and disengage the converter clutch, which is essential for fuel efficiency and performance. Understanding this pressure range is crucial for anyone involved in the maintenance or diagnosis of automotive systems, as deviations from the norm can lead to issues like slippage, overheating, or even damage to the torque converter itself.