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Author Topic: Truck noise troubleshooting  (Read 1904 times)

Offline Stein

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Truck noise troubleshooting
« on: October 28, 2020, 05:54:50 PM »
So, my 2000 Silverado started acting up today and hoping the pros here can help again.  I'm getting a noise that starts at about 40 mph and definitely noticeable at 60-70.  I can't tell where it's coming from, up front I think.  It sounds like a flat tire or a plastic fender well rubbing, but I checked both and everything looks fine.

It isn't affected by braking or putting the truck in neutral while moving.  When I go over a bump, it gets louder when the truck sinks down on the shocks and less when it is up on the shocks (as I go over the bump).  I would say it's more of a noise than vibration although wen I go over the bump it gets louder and a low vibration.  Nothing through the steering wheel or brake pedal though.

So, I'm thinking bearings or u-joints, but the neutral thing makes me think not u-joints and I don't really know what I'm doing anyway.

I'm going to lift the front and wiggle and turn the wheels to see if anything obvious jumps out.  Any troubleshooting advice?  I'm headed to MT in a few days and was going to leave this truck for Mrs. Stein to drive so I want to fix it asap.

Thanks in advance.

Online rtspring

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Re: Truck noise troubleshooting
« Reply #1 on: October 28, 2020, 06:03:59 PM »
Just fixed a problem like this on a f-150 up in the mtns.  Turns out it was a strut! Damn thing threw us for a spin trying to find the noise.  Have you checked your shocks?
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Offline Skyvalhunter

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Re: Truck noise troubleshooting
« Reply #2 on: October 28, 2020, 06:08:41 PM »
Can you tell where it's coming from? Can someone ride in the bed to listen for location. Wouldn't rule out u joint. Are your u joints greasable? Usually they will clunk and you will get a vibration. Have you jacked the wheel up checked for wheel movement from side to side?

Offline mazama

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Re: Truck noise troubleshooting
« Reply #3 on: October 28, 2020, 06:22:44 PM »
On my ford,longbed with a 2 piece driveline it was the rubber that goes around a berring,started vibration just wore out with age.

Offline Stein

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Re: Truck noise troubleshooting
« Reply #4 on: October 28, 2020, 06:28:30 PM »
I THINK it's the driver wheel bearing.  It makes a faint noise when I spin the wheel and the other side doesn't.  Neither side had any play, shocks look fine.  I might peek at the u-joint to see if I see anything but if I accelerated or put it in neutral it didn't seem to change the noise at all and I would think that would be noticeable based on the last u-joint I replaced years ago.

It's $130 to see if the wheel bearing is the culprit.

Offline ghosthunter

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Re: Truck noise troubleshooting
« Reply #5 on: October 28, 2020, 06:31:47 PM »
Had same issue with my Nissan Frontier, 100k

Sounded like a flat.
Needed new struts and shocks. Was told that caused cupping in the tires. Three treads one in middle worn lower.

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Offline Stein

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Truck noise troubleshooting
« Reply #6 on: October 28, 2020, 06:37:58 PM »
Here is the noise the wheel makes when I spin it.



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Offline Crunchy

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Re: Truck noise troubleshooting
« Reply #7 on: October 28, 2020, 06:43:57 PM »
Drive line or carrier bearing?

Offline Stein

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Re: Truck noise troubleshooting
« Reply #8 on: October 28, 2020, 06:49:41 PM »
Sounds like its coming from the hub.  Is that the carrier?  I was thinking about replacing the whole hub.


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Offline Stein

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Re: Truck noise troubleshooting
« Reply #9 on: October 28, 2020, 06:50:55 PM »
Is there any way to check driveline ujoints without removing them?  Maybe jack rear, put in neutral and spin both rear wheels?


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Offline Skyvalhunter

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Re: Truck noise troubleshooting
« Reply #10 on: October 28, 2020, 06:56:35 PM »
You should be able to Jack the rear up turn wheels one direction the look for slack at the u joint or carriage bearing. Alot or time shifting from drive to reverse and back will result in a clunking noise in a bad u joint

Offline KNOPHISH

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Re: Truck noise troubleshooting
« Reply #11 on: October 28, 2020, 07:06:19 PM »
I got sorta the same thing but only when I hit 70mph. I'd describe mine as a vibration or humming on a 05 Silverado. Tried tire pressure, rotation & rebalance but still there. Shop that put on driveline said bring it in but that was only 5 years ago with no hard 4x4ing. I'd think that would cover u-joints too unless they messed up. Prolly due for shocks but would that cause a vibration? 195k miles on her.
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Offline Stein

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Re: Truck noise troubleshooting
« Reply #12 on: October 28, 2020, 07:09:26 PM »
Thanks Skyval, I'll try that tomorrow although a clunking noise when shifting a Chev into gear won't be a new thing.  I'll listen for a different clunk or have my kids shift and I'll look. 

This truck has launched boats many times, so I wouldn't be surprised if it was the rear u-joint, but I am pretty careful with keeping the truck out of the water and rinsing and it looks ok from the outside and isn't the greasable type.

I'm 70% sure it's the wheel bearing and in my line of home mechanics, that's a pretty high probability.  I'll check other things like joints, shocks and the tire surfaces when it's daylight out and go from there.

Thanks.

Offline Fl0und3rz

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Re: Truck noise troubleshooting
« Reply #13 on: October 28, 2020, 07:38:46 PM »
My guess is u-joint, which makes sense only happening under load, at certain speeds, or with certain deflection. On a driveline, you should be able to put in neutral with parking brake on and check at the tail shaft, drive shaft end and the drive shaft, differential end.  Expect there to be no slop in those joints. 

Offline MR5x5

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Re: Truck noise troubleshooting
« Reply #14 on: October 29, 2020, 09:18:36 AM »
U-Joints - Grab the biggest screw driver you have, jam it in there an reef/twist on it.  They should not move.

Carrier Bearing - located along the drive shaft, attached to the frame - basically additional support for the drive shaft.  Push up and down on it. It should be tight but they are harder to verify.  They absolutely make a whirring noise as they go out.  Remember, the "putting it in neutral" test does not stop the driveshaft from spinning, it just unloads it from the tyranny.

Wheel bearing making noise seems like a pretty good indicator.  Especially if you have play in the wheel when wiggling it top to bottom while elevated.

Good luck.

 


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