Strange noise

[jscott]

On my way home yesterday, after driving the car for 2+ hours I started to hear a noise. It sounded like if you were driving past a saw mill, a high speed metal noise that would come and go. When I would take my foot off the gas it would stop immediately, Revving the engine in neutral (fmx auto) revealed it was not coming from the engine. To me (poor hearing) it sounded like it was coming from the rear, but it was not constant, would start then after a few seconds fade (thus the driving past a saw mill thought) It would happen mostly at 44mph-60mph but also heard it lower once or twice. I have been waiting to get her into the shop for a diffy seal replacement (slow drip leak) as well as an output shaft seal replacement (slow tranny fluid drip). If not the engine what could it be that would stop when not in gear?? Thanks for your thoughts.

 

[Sheriff41]

Check your u-joints.

 

[Tnfastbk]

sounds to me like a bearing trying to seize up somewhere. I know an alternator will do that only when it is charging at time. But could be many things. Let the hunt begin. Keep us posted. Just check the simple things first.