Weird thumping sound from front end

[chilleblanco36]

As the title says, I have some type of thumping sound coming from the front end I think on my 2010 Tahoe LT. It thumps with every revolution of the wheel and gets faster as the vehicle speeds up. I replaced pads and rotors back in November. Seems to drive smooth at speed and stops with no shimmy. I hear no roaring as you would with a bad wheel bearing. Any idea what this could be? Bad tire maybe? All input will be greatly appreciated


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[iamdub]

Hard to diagnose without us hearing it. Is it 4WD?

You could rotate the tires front-to-back, one side at a time. If the sound moves, you've isolated it to a single bad tire.

 

[chilleblanco36]

Hard to diagnose without us hearing it. Is it 4WD?

You could rotate the tires front-to-back, one side at a time. If the sound moves, you've isolated it to a single bad tire.

It’s 2WD. I’m taking it to have the tires rotated and balanced one day next week. I was going to let them check the tires as well. I thought maybe I had a screw in a tire as that’s what it sounds like, but nothing. I checked all 4.


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[iamdub]

It’s 2WD. I’m taking it to have the tires rotated and balanced one day next week. I was going to let them check the tires as well. I thought maybe I had a screw in a tire as that’s what it sounds like, but nothing. I checked all 4.


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A screw usually makes a "ticking" sound. A bad tire (separated belt, etc.) can make a "thwomping" sound. Notice any odd tire wear or not all tread blocks dirty from contacting the road?

 

[chilleblanco36]

A screw usually makes a "ticking" sound. A bad tire (separated belt, etc.) can make a "thwomping" sound. Notice any odd tire wear or not all tread blocks dirty from contacting the road?

Doesn’t appear to be. Tires are in great shape appearance wise.


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[swathdiver]

A busted belt in a tire will also be felt. Probably time to change one or both hubs; they don't always roar or moan.

 

[M3kanic]

I know it sounds silly, but are your lug nuts tight.

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[chilleblanco36]

I know it sounds silly, but are your lug nuts tight.

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Yes, they are torqued using a torque wrench


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[swathdiver]

My left hub is making the whomp whomp sound right now. More noticeable at low speed, only 10 degrees warmer than other hub. I fixed it by turning the radio up louder until we order all the parts to redo the front brakes.

 

[chilleblanco36]

My left hub is making the whomp whomp sound right now. More noticeable at low speed, only 10 degrees warmer than other hub. I fixed it by turning the radio up louder until we order all the parts to redo the front brakes.

It doesn’t look like a hard job to replace the hubs at all. The big question is which hubs to purchase? Local parts store or dealer which I know will be sky high. My vehicle has 120k miles and they failed.


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[Derick]

The big question is which hubs to purchase? Local parts store or dealer which I know will be sky high. My vehicle has 120k miles and they failed.


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Rock auto has timkins for ~200...that said, I've been having good luck with the mevotech stuff, and it seems to be pretty highly respected.... those are 113, fronts, right now on RA.

 

[HiHoeSilver]

It doesn’t look like a hard job to replace the hubs at all. The big question is which hubs to purchase? Local parts store or dealer which I know will be sky high. My vehicle has 120k miles and they failed.


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Timken all day.

 

[swathdiver]

It doesn’t look like a hard job to replace the hubs at all. The big question is which hubs to purchase? Local parts store or dealer which I know will be sky high. My vehicle has 120k miles and they failed.

That's around the mileage when they go. Timken is the OE supplier last time I checked and that is what I and others here use. Remember to change the 35mm nut and torque it to 177 ft lbs. The other four to 133 ft lbs. Timken PN# for 4WD or 2WD is SP500301. The Dorman axle nut is 36mm.

Some are tempted to go with less expensive and while the hardware may be just fine, the built in ABS sensors are junk and I had one on another vehicle that never worked and left the ABS light on.

 

[chilleblanco36]

That's around the mileage when they go. Timken is the OE supplier last time I checked and that is what I and others here use. Remember to change the 35mm nut and torque it to 177 ft lbs. The other four to 133 ft lbs. Timken PN# for 4WD or 2WD is SP500301. The Dorman axle nut is 36mm.

Some are tempted to go with less expensive and while the hardware may be just fine, the built in ABS sensors are junk and I had one on another vehicle that never worked and left the ABS light on.

Gotcha. Thanks for the info. I assume the axle nut would only apply to the 4WD vehicles.


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[swathdiver]

Gotcha. Thanks for the info. I assume the axle nut would only apply to the 4WD vehicles.

Yessir.

 

[Wolfbraid]

Just got done doing my Driver side last week, and now my Pass side went today and I did it tonight... 4WD not a terribly hard job, just make sure to have the tools you need. Biggest thing I could have used was a long breakerbar for the hub nut. You may have to soak the hub with PBlaster or your penetrating oil of choice where it contacts the dustshield/spindle. Took about 4 hours(with interruptions and dinner) one hour was wasted on the hub nut(pass side)

 

[chilleblanco36]

Just got done doing my Driver side last week, and now my Pass side went today and I did it tonight... 4WD not a terribly hard job, just make sure to have the tools you need. Biggest thing I could have used was a long breakerbar for the hub nut. You may have to soak the hub with PBlaster or your penetrating oil of choice where it contacts the dustshield/spindle. Took about 4 hours(with interruptions and dinner) one hour was wasted on the hub nut(pass side)

That’s my thing as well. I want to say it’s coming from the passenger side, but can’t be 100% sure. I’d be upset if I swap it and find it’s the drivers side. I guess I should go ahead and swap both


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[Wolfbraid]

That’s my thing as well. I want to say it’s coming from the passenger side, but can’t be 100% sure. I’d be upset if I swap it and find it’s the drivers side. I guess I should go ahead and swap both


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If its the hub, you can jack it up and wiggle the wheels to find out.

Alternatively when driving, this usually works
or When Turning Left, you'll hear/feel get louder on the right side..
or when turning right, you'll hear/feel get louder on the left side...

 

[chilleblanco36]

I want to say it’s more noticeable when turning in a sweeping right. I did try wiggling the wheels but it seemed fine.


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[swathdiver]

If its the hub, you can jack it up and wiggle the wheels to find out.

Alternatively when driving, this usually works
or When Turning Left, you'll hear/feel get louder on the right side..
or when turning right, you'll hear/feel get louder on the left side...

My passenger side did this but the driver's side is not doing that, just whomp whomp whomp.