help determining vibration noise - The 1947 - Present Chevrolet & GMC Truck Message Board Network

highwinger · 06-22-2016, 08:09 AM

I get a audible vibration, I also feel it in the seat, at 60 mph. I don't feel it in the steering wheel. I have a fresh set of tires, properly inflated, with an alignment too. The vibration isn't constant like a steady drone, it pulses...whomp whomp...low pitched, not high like metal rubbing.

Any ideas?

Bigdav160 · 06-22-2016, 08:33 AM

Rotating parts resonate at different frequencies. Driveshafts rotate 3-4x wheel speed so have a higher frequency and tend to resonate at lower and higher vehicle speeds.

60 mph is almost always related to something spinning wheel speed.

highwinger · 06-22-2016, 09:12 AM

Quote:

Originally Posted by Bigdav160

Rotating parts resonate at different frequencies. Driveshafts rotate 3-4x wheel speed so have a higher frequency and tend to resonate at lower and higher vehicle speeds.

60 mph is almost always related to something spinning wheel speed.

So it may be a wheel balance issue still. Anything else to look for?

Bigdav160 · 06-22-2016, 09:28 AM

Runout on the wheels, tires, hub flanges, axles/bearings

PortHeadlight · 06-22-2016, 10:02 AM

As my daughter replied... "oh yeah, I hear it, too. Just turn the radio up louder. See, it went away."

06-22-2016, 08:09 AM	#1
highwinger Registered User Join Date: May 2014 Location: Melbourne, FL Posts: 297	help determining vibration noise I get a audible vibration, I also feel it in the seat, at 60 mph. I don't feel it in the steering wheel. I have a fresh set of tires, properly inflated, with an alignment too. The vibration isn't constant like a steady drone, it pulses...whomp whomp...low pitched, not high like metal rubbing. Any ideas?

06-22-2016, 08:33 AM	#2
Bigdav160 Registered User Join Date: Apr 2011 Location: Klein Texas Posts: 3,852	Re: help determining vibration noise Rotating parts resonate at different frequencies. Driveshafts rotate 3-4x wheel speed so have a higher frequency and tend to resonate at lower and higher vehicle speeds. 60 mph is almost always related to something spinning wheel speed. __________________ My Classics: '72 K20 Suburban + '65 Dodge Town Wagon '72 Corvette Roadster +'67 Corvette Roadster '73 Z-28 Camaro '63 Ford SWB Uni Pickup '50 Ford Coupe

06-22-2016, 09:28 AM	#4
Bigdav160 Registered User Join Date: Apr 2011 Location: Klein Texas Posts: 3,852	Re: help determining vibration noise Runout on the wheels, tires, hub flanges, axles/bearings __________________ My Classics: '72 K20 Suburban + '65 Dodge Town Wagon '72 Corvette Roadster +'67 Corvette Roadster '73 Z-28 Camaro '63 Ford SWB Uni Pickup '50 Ford Coupe

06-22-2016, 10:02 AM	#5
PortHeadlight Registered User Join Date: Nov 2007 Location: Cape Elizabeth, Maine Posts: 196	Re: help determining vibration noise As my daughter replied... "oh yeah, I hear it, too. Just turn the radio up louder. See, it went away."



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