Vibration - The 1947 - Present Chevrolet & GMC Truck Message Board Network

1986scottsdale · 08-02-2009, 07:51 PM

Hi my names ismael and i drive an 86 c10. And my truck vibrates when hit speeds above 60, I got it balanced and that didnt seem to help.

What do you think is the problem?

**old Rusty C10** · 08-02-2009, 08:15 PM

we need more info... motor trans? could be a driveshaft or carrier bearing tires rotor or drum even a u joint

1986scottsdale · 08-02-2009, 08:19 PM

Quote:

Originally Posted by old rusty c10

we need more info... Motor trans? Could be a driveshaft or carrier bearing tires rotor or drum even a u joint

305 & 700

tomtuna1978 · 08-02-2009, 08:22 PM

what did you get ballanced ? your tires? or the driveshaft?... if you have ballansed the tires, the driveshaft would be the next thing id look at. is it lowered or lifted? if it is you might have a driveshaft angle that is wrong, that can cause vibrations. give us some more info.

1986scottsdale · 08-02-2009, 08:33 PM

Quote:

Originally Posted by tomtuna1978

what did you get ballanced ? your tires? or the driveshaft?... if you have ballansed the tires, the driveshaft would be the next thing id look at. is it lowered or lifted? if it is you might have a driveshaft angle that is wrong, that can cause vibrations. give us some more info.

Tires, the truck has lowering shackles

Keith Seymore · 08-03-2009, 06:48 AM

You need to see if you can start separating different systems out, so you know what it is not...

For example, park the truck so that it is not moving. Rev the engine in neutral to the same RPM as you normally get the vibration and see if it is still there. If it is not, then you know it is not caused by anything engine related (flywheel, harmonic balancer, engine miss, etc).

Similarly, drive the truck so it is vibrating. Tip into the throttle a little and/or let off the throttle a little bit. Does the vibration change? If it does, typically that would indicate a driveline problem (driveshaft balance or u joint angles).

Does the vibration keep getting worse the faster you go? Normally that would be a tire problem. Does it get better if you go faster than 60 mph? Again, that usually indicates a driveline problem.

If you can swap tire/wheels from another vehicle that can also provide clues.

You need to play around a bit and report back your findings.

HTH -

K

08-02-2009, 07:51 PM	#1
1986scottsdale Registered User Join Date: Apr 2009 Location: Central Coast, CA Posts: 36	Vibration Hi my names ismael and i drive an 86 c10. And my truck vibrates when hit speeds above 60, I got it balanced and that didnt seem to help. What do you think is the problem?

08-02-2009, 08:15 PM	#2
old Rusty C10 Robert Olson Transport Join Date: Oct 2002 Location: recent transplant to NC USA Posts: 20,319	Re: Vibration we need more info... motor trans? could be a driveshaft or carrier bearing tires rotor or drum even a u joint __________________ Bob 1951 International running on a squarebody chassis "If a man's worth is judged by the people he associates himself with, then i am the richest man in the world knowing some of the fine people of this board" http://67-72chevytrucks.com/vboard/a...t.php?f=25&a=9 (you can review the site rules here!) PM Me for your vehicle/parts hauling needs in the North East US or see my Facebook page Robert Olson Transport Live each day to the fullest.. you never know when fate is going to pull the rug out from under you... I hate cancer!!

08-02-2009, 08:22 PM	#4
tomtuna1978 Registered User Join Date: Apr 2009 Location: Bend,Oregon Posts: 225	Re: Vibration what did you get ballanced ? your tires? or the driveshaft?... if you have ballansed the tires, the driveshaft would be the next thing id look at. is it lowered or lifted? if it is you might have a driveshaft angle that is wrong, that can cause vibrations. give us some more info.

08-03-2009, 06:48 AM	#6
Keith Seymore Registered User Join Date: May 2009 Location: Motor City Posts: 9,239	Re: Vibration You need to see if you can start separating different systems out, so you know what it is not... For example, park the truck so that it is not moving. Rev the engine in neutral to the same RPM as you normally get the vibration and see if it is still there. If it is not, then you know it is not caused by anything engine related (flywheel, harmonic balancer, engine miss, etc). Similarly, drive the truck so it is vibrating. Tip into the throttle a little and/or let off the throttle a little bit. Does the vibration change? If it does, typically that would indicate a driveline problem (driveshaft balance or u joint angles). Does the vibration keep getting worse the faster you go? Normally that would be a tire problem. Does it get better if you go faster than 60 mph? Again, that usually indicates a driveline problem. If you can swap tire/wheels from another vehicle that can also provide clues. You need to play around a bit and report back your findings. HTH - 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/ Last edited by Keith Seymore; 08-03-2009 at 06:49 AM.

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