Whine/Buzz coming from Engine?

Hi Ken, well everything is fine now. Cold oil pressure are 50psi. I did replace the sensor with new OEM, plus also I did not have the front ground connected, which may have caused a ground float on the sensor.

However, the noise did not go away. Ah well. At least I have some new parts. I think once I get the axle and steering back in I will disconnect the tranny at the TC to make sure it is not trans, then hook up the chassis ears to the scope, and do a bit of noise/vibration analysis.

Yes. I removed all the belts (AC, vacuum pump and serpentine) and the noise still persisted. Obviously, my stethoscope skills leave something to be desired.