Rumbling sound from the car.

[DapperO]

Hi i recently changed my tires(BF Goodrich from Costco) at 30k and it’s been around 600 miles since i changed the tires and did an alignment right after changing the tires.! Recently took the car for an out of state drive and noticed that there is a rumbling noise coming from the car only happens when i take my foot off the gas and only happens between 70 and 80 mph. say if I'm at 85mph and take my foot off the gas the rumbling noise wont come on until it gets to 80mph and stays on until 70mph and disappears below 70mph.

Have no idea whats happening and internet tells me all kinds of things none of which seems to fit my situation.!


Any thoughts…?

 

[Glasman888]

Check the tire balance first. Since it's speed-specific and new tires were installed, a wheel weight likely fell off. Have them rebalanced. If that doesn't fix it, have them check for a possible shifted belt inside a tire.