vibration at 65-70 - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Walts_restoration · 10-21-2010, 12:03 PM

When i drive my 83 2wd c10, i get a vibration at roughly 65-70 mph, but when i drive 60 its fine and when i do 75 its fine. At first i thought it was the road, but now im not so sure. I cant remember if it did it with my other set of tires or not (just put new wheels/tires on the truck from another truck entirely). I went from cheapo passenger car tires to a decent set of lt tires, same size wheels 15x8 rallies. I know the rubber of my carrier bearing is going bad, and when i put it in gear i get a clunk (its an auto), but it almost feels like the front end is where the vibration is coming from and not the driveshaft. Also has new monroe gas magnums, so i know its not the shocks. Should i get the wheels balanced? they looked balanced but i didn't have them done and it was on my parts truck like they are on my own now. Or maybe an alignment issue? but I would think alignment would be a constant thing if it was off. Thoughts?

rob67 · 10-21-2010, 09:05 PM

Sounds like u joints, especially with the clunk you described. I would replace that carrier bearing as well.
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Davidmichael · 10-21-2010, 09:52 PM

could also be a belt broken in a tire. I would test out the tires. swap them and see if it goes away. At least that's the cheapest.

3r!c84 · 10-22-2010, 01:02 AM

nope stop. take it back to where ever you got the tires from and have them re-balance your tires. (at no cost)

Walts_restoration · 10-22-2010, 09:46 AM

Quote:

Originally Posted by 3r!c84

nope stop. take it back to where ever you got the tires from and have them re-balance your tires. (at no cost)

I don't think my dad will accept returns on the free set of wheels and tires I pulled off one of his parts trucks haha. Gonna talk to my buddies dad about balancing them for me. We have a tire machine but no balancer.
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3r!c84 · 10-22-2010, 09:54 AM

Oh haha sorry about that
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*78 Chevyrado* · 10-22-2010, 10:10 AM

alignments can cause vibrations too.

If you goto a tire store chain they usually will check alignments for free. it only costs if they do any fixin on it.

3r!c84 · 10-22-2010, 11:32 AM

very true. a free alingment check. and they will do a quick check oh your ball joints,and tie rods

Keith Seymore · 10-22-2010, 11:40 AM

Normally tire problems start and get progressively more pronounced as you increase speed.

Compared to a tire, the driveline doesn't have as much mass to drive the disturbance. It can only generate that much energy at it's "resonant" point, so normally a driveline problem will have a "unsweet spot" were it's worse and then increasing the speed causes it to get better.

My vote based on what you've said: driveline.

K

10-21-2010, 12:03 PM	#1
Walts_restoration Real Projects never die Join Date: Jan 2007 Location: Lawrence, kansas Posts: 1,508	vibration at 65-70 When i drive my 83 2wd c10, i get a vibration at roughly 65-70 mph, but when i drive 60 its fine and when i do 75 its fine. At first i thought it was the road, but now im not so sure. I cant remember if it did it with my other set of tires or not (just put new wheels/tires on the truck from another truck entirely). I went from cheapo passenger car tires to a decent set of lt tires, same size wheels 15x8 rallies. I know the rubber of my carrier bearing is going bad, and when i put it in gear i get a clunk (its an auto), but it almost feels like the front end is where the vibration is coming from and not the driveshaft. Also has new monroe gas magnums, so i know its not the shocks. Should i get the wheels balanced? they looked balanced but i didn't have them done and it was on my parts truck like they are on my own now. Or maybe an alignment issue? but I would think alignment would be a constant thing if it was off. Thoughts? __________________ Ill put it this way, ive got a few lawn ornaments My name tag says Ryan KansasTwister On other forums

10-21-2010, 09:05 PM	#2
rob67 Registered User Join Date: Sep 2008 Location: Raleigh, NC Posts: 77	Re: vibration at 65-70 Sounds like u joints, especially with the clunk you described. I would replace that carrier bearing as well. Posted via Mobile Device

10-21-2010, 09:52 PM	#3
Davidmichael Registered User Join Date: Jun 2010 Location: Pittsburgh PA Posts: 686	Re: vibration at 65-70 could also be a belt broken in a tire. I would test out the tires. swap them and see if it goes away. At least that's the cheapest. __________________ 86 Suburban 2WD = rolled it and totaled it 83 LWB STD Cab 4x4 = went to the scrapper. Was my baby. 84 Suburban 2WD = stripped it/ scrapped it 81 8 foot bed made into a trailer 86 Suburban going to be made into a trailer 91 Suburban 4x4 = that's my baby 00 S10 Xtreme STD Cab 01 S10 ZR2

10-22-2010, 01:02 AM	#4
3r!c84 Badass Join Date: Jan 2009 Location: lox. fl Posts: 4,586	Re: vibration at 65-70 nope stop. take it back to where ever you got the tires from and have them re-balance your tires. (at no cost) __________________ Think outside the box? -84c10 (1stcar)→My Build← -00 Saturn 5spd drop a gear and disappear! 1/4:13:90

10-22-2010, 09:54 AM	#6
3r!c84 Badass Join Date: Jan 2009 Location: lox. fl Posts: 4,586	Re: vibration at 65-70 Oh haha sorry about that Posted via Mobile Device __________________ Think outside the box? -84c10 (1stcar)→My Build← -00 Saturn 5spd drop a gear and disappear! 1/4:13:90

10-22-2010, 10:10 AM	#7
78 Chevyrado Account Suspended Join Date: Dec 2007 Location: Unnapreciative, Trollville Posts: 2,079	Re: vibration at 65-70 alignments can cause vibrations too. If you goto a tire store chain they usually will check alignments for free. it only costs if they do any fixin on it.

10-22-2010, 11:32 AM	#8
3r!c84 Badass Join Date: Jan 2009 Location: lox. fl Posts: 4,586	Re: vibration at 65-70 very true. a free alingment check. and they will do a quick check oh your ball joints,and tie rods __________________ Think outside the box? -84c10 (1stcar)→My Build← -00 Saturn 5spd drop a gear and disappear! 1/4:13:90

10-22-2010, 11:40 AM	#9
Keith Seymore Registered User Join Date: May 2009 Location: Motor City Posts: 9,226	Re: vibration at 65-70 Normally tire problems start and get progressively more pronounced as you increase speed. Compared to a tire, the driveline doesn't have as much mass to drive the disturbance. It can only generate that much energy at it's "resonant" point, so normally a driveline problem will have a "unsweet spot" were it's worse and then increasing the speed causes it to get better. My vote based on what you've said: driveline. K __________________ Chevrolet Flint Assembly 1979-1986 GM Full Size Truck Engineering 1986 - 2019 Intro from an Old Assembly Guy: http://67-72chevytrucks.com/vboard/s...d.php?t=342926 My Pontiac story: http://forums.maxperformanceinc.com/...d.php?t=560524 Chevelle intro: http://www.superchevy.com/features/s...hevy-chevelle/

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