Your silhouette van sometimes makes a noise like a failing power steering pump then it shifts hard what sensor for the torque converter would it be?

The issue you're describing with your Silhouette may be related to the Torque Converter Clutch (TCC) solenoid or the Transmission Fluid Temperature (TFT) sensor. A failing TCC solenoid can cause hard shifting and unusual noises, as it controls the engagement and disengagement of the torque converter. Additionally, if the TFT sensor is malfunctioning, it may not provide the correct temperature readings, leading to improper shifting behavior. It's advisable to have the vehicle diagnosed with a scan tool to pinpoint the exact cause.