Rumbling sound or vibration

[DapperO]

Hi,

I recently changed my tires at 30k on the 2023 g80 (BF Goodrich from Costco) and had an alignment right after, it has been around 600 miles after changing.! Recently took the car to an out of state drive and noticed a rumbling sound coming from the car between 70-80 mph when i take my foot off the gas.

Only happens between those speeds. Like if I’m at 85mph and take my foot off the gas.! Rumbling noise wont come on until 80mph and lasts until 70mph and i wont hear it inside cabin below 70mph.

Internet is talking all kinds of things all kinds of things none of which seem to fit my situation.!

Any thoughts or ideas.! Anyone ever faced the same situation.!

 

[TinsleyC]

Since the problem started after the tires were replaced, I'd say it was an issue with the tires. It's some kind of vibration at that particular speed that creates the resonance you're hearing. It's likely a balance issue. I'd go back to Costco and have them check it out.