Slight background rumble around 70mph

2023 Limited, all stock. Wondering if anyone else has noticed a slight rumble / resonance at around 70mph? Starts around 67mph and trails off around 74mph, been doing it since we picked it up new in March. Currently 10k miles on it with zero issues. Doesn't feel like tire imbalance, and have done 2 5-tire rotations and greased the u-joints and pilot shaft with no change at all. No too worried about it as its really faint. I'm suspecting its just some combination of background vibrations that all come together at that speed. Wife hasn't ever said anything about it, so clearly it isn't very loud, but I'm more in tune with these things. Thanks!

 

I wouldn’t call it a rumble, but my rear diff starts to sing quietly at around that speed. If I were musical, I could tell you the note it’s singing, but otherwise it sounds like it’s holding a note. Mine happens between 65-70. Noticed it early in it’s life. Has not gotten worse and Im about to turn 70k soon.