Intermittent Rear Tire/Rear End Noise

2020 SR5. 10k miles. No modifications except relativey new tires: 10 ply LT, stock size with about 3k on them. Vehicle was purchased new.

I have noticed an obvious rear-end/rear tire noise when driving at around 35 - 60 mph on the way to work on cold mornings, the noise goes away after about 6 or 7 miles. I have heard this noise twice and both times were cold mornings (10 - 30 degrees f). The noise sounds similar to ice buildup rubbing the right rear tire. The first time it happened I assumed it was ice because of the weather, the second time it was definately not ice - the pavement and vehicle were both dry. Noise gets louder as vehicle speed increases. I have only noticed the noise this spring and this is the first spring with the new tires. The second time I heard the noise it was following an underbody rinse the evening before.

Any thoughts on this one? Every morning this spring has been cold so the temp alone does not seem to explain this. Some afternoons are cold also and I have not heard this noise on the way home from work.

My first thought was to rotate the tires but that is mostly because it is easy and I have no logical hypothesis to exain the noise.

Thans for reading!

 

I would guess the new tires develop
flat spots after sitting in the cold that go away after a bit of driving. The longer they sit, the more pronounced the flat spot. Mine do that, but I get a little shimmy, not noise. My OEM Duelers never did that. Maybe your right rear tire is a little under inflated, exacerbating the symptom?