Rear Axle Bearing Noise

I took my 66 wagon out for its weekly exercise a few days ago and part of the loop is on the tollway where I can run it up to 75-80. It's a quiet car except for some wind noise but this time I heard a new sound, a high-pitched whistling or moaning. I turned off the A/C, no change, put the car in neutral, no change. No vibration, pulling, dragging or other symptoms but the noise kept up until I exited and slowed down below 60-65. No noise or other issues driving home at slower speeds. When I...

Rear Axle Bearing Noise
Author: TxDon