I was listening for an out-of-place hummm today and could only find the sound of the wheel speed cable. But that's more of a Rattle than a Humm. 

> On Aug 22, 2017, at 2:24 PM, Dan N <dn92610@GMAIL.COM> wrote:
> 
> if the hummm is there in neutral then it's not the trans...
> 
> better yet... try this on an empty road.. do it safely...
> 
> drive till you hear the humm... put it on neutral... listen... shut off the
> engine and turn the key back on one notch so you won't lock the steering
> wheel... now listen again...
> 
> with no radio and/or talkative people around you of course...