Slight hum/grind after curb strike

[madmaxwell87]

My wife recently took a corner too sharp and got both passenger side tires(2009 gt awd with stock 245/45/20 goodyears on stock 20s for reference). It was a good hit and put an indentation on the wheels themselves both front and rear about 2" long. We had all 4 tires replaced as the two good tires were old enough I didn't want to risk too big of a diameter difference screwing up the awd. The tire store mentioned that the two hit wheels are fairly wobbly and would eventually need replacement. He also suggested an alignment.

We got the car back and I drove it to see if there was any wobble, pull, or shimmy indicating it really needed an alignment. It seems to drive fine. However on slow speed coasting there's a slight hum/grinding noise that wasn't there before hitting the curb. It doesn't do it during acceleration or braking or at higher speeds, just when coasting under about 35-40. Thoughts?

I'm hoping she didn't push an axle into the transmission or rear diff or mess up a bearing. Could it just be that the wheels need to be replaced? The tire shop put the damaged wheels on the rear axle.

 

[leeharvey418]

It's a wheel bearing. Sorry.

 

[madmaxwell87]

I figured a wheel bearing would be a more constant noise.

 

[leeharvey418]

I had a parked vehicle get hit and pushed into the curb a few years back. It hit hard enough to bend the wheel and take a chunk out of the concrete curb. The mental giants at the body shop replaced the wheel, but they never bothered to pull the bearing or even do a test drive after they had it all buttoned up. When I got it back, I had exactly the condition you're describing - the grind was most pronounced at low speed, but it would turn into a higher pitched whine that blended into road noise at higher speed.

 

[madmaxwell87]

Interesting. Well glad you had first had experience with a very similar situation. Guess I have to isolate which end the noise is coming from and get that replaced. Thanks for the help!