Shake a leg...or truck - The 1947 - Present Chevrolet & GMC Truck Message Board Network

lgvl · 07-07-2014, 04:17 PM

So i was coming home on the highway last week doing 65mph and noticed that there was a great amount of vibration in the truck, '82 C30 dually, bad enough that the dash was squeaking because it was moving back and forth so quickly. But i didn't have any vibration in the steering wheel. It only happened above 60mph, however i have now noticed vibration at 45mph as well. So long story short i figured it was the carrier bearing and after some inspection of the u-joints decided to replace both the carrier bearing and all three u-joints. This was done and after reinstallation i still have the exact same problem. I'm trying to avoid having to take the drive shafts in for balancing and i seem to remember not having this problem until i hit a curb with the back passenger tire a couple weeks ago. Any suggestions? It just seems odd to me that drive shaft would all of a sudden go unbalanced. Could hitting the curb have unbalanced the drive shaft? I don't see how. Thanks!

J Knight · 07-07-2014, 05:01 PM

Sounds to me like you could have slipped belts in the tire you curb checked.

Lift the tire you hit and spin it to see if you have a knot in that tire.

wjjeeper · 07-07-2014, 05:02 PM

Check your rims for lost weights or mud packed in places.

**old Rusty C10** · 07-07-2014, 09:50 PM

or a bubble on the inside of the tires

mrolds88 · 07-07-2014, 09:54 PM

Also check the pinion bearing. Had a Suburban loosen the pinion nut once. WOW??

andrewmp6 · 07-08-2014, 02:22 AM

It could be you knocked a weight off the wheel or bent the wheel,Or if you hit it hard enough could have bent a axle shaft.

lgvl · 08-31-2014, 02:37 PM

Sorry for not commenting earlier, i work at sea and had to go to work a few days after i posted this. As you can imagine i usually have more important things to do, like spending time with family, than working on my truck before leaving so didn't get much time to trouble shoot until now. Anyway, I removed both of the rear driver side tires and both have nice big bulges in them under the tread at one point. I'm guessing this is a result of the plies coming apart. So I will be going to get two new tires. My plan is to swap the two old front tires to the back with the other two good old tires and put the new ones on the front. How does that sound to everyone? I know matching tires on the rear of a dually is important. Thanks for the help everyone!

Your41Plague12 · 09-01-2014, 12:18 AM

Quote:

Originally Posted by lgvl

Sorry for not commenting earlier, i work at sea and had to go to work a few days after i posted this. As you can imagine i usually have more important things to do, like spending time with family, than working on my truck before leaving so didn't get much time to trouble shoot until now. Anyway, I removed both of the rear driver side tires and both have nice big bulges in them under the tread at one point. I'm guessing this is a result of the plies coming apart. So I will be going to get two new tires. My plan is to swap the two old front tires to the back with the other two good old tires and put the new ones on the front. How does that sound to everyone? I know matching tires on the rear of a dually is important. Thanks for the help everyone!

That's exactly what I would do. Sounds like you found your problem, let us know how it works.

07-07-2014, 04:17 PM	#1
lgvl Registered User Join Date: Mar 2013 Location: Rochelle, Il Posts: 63	Shake a leg...or truck So i was coming home on the highway last week doing 65mph and noticed that there was a great amount of vibration in the truck, '82 C30 dually, bad enough that the dash was squeaking because it was moving back and forth so quickly. But i didn't have any vibration in the steering wheel. It only happened above 60mph, however i have now noticed vibration at 45mph as well. So long story short i figured it was the carrier bearing and after some inspection of the u-joints decided to replace both the carrier bearing and all three u-joints. This was done and after reinstallation i still have the exact same problem. I'm trying to avoid having to take the drive shafts in for balancing and i seem to remember not having this problem until i hit a curb with the back passenger tire a couple weeks ago. Any suggestions? It just seems odd to me that drive shaft would all of a sudden go unbalanced. Could hitting the curb have unbalanced the drive shaft? I don't see how. Thanks! __________________ '82 C30 3+3 Dually 454

07-07-2014, 05:01 PM	#2
J Knight Registered User Join Date: Jun 2011 Location: Baytown TX Posts: 2,219	Re: Shake a leg...or truck Sounds to me like you could have slipped belts in the tire you curb checked. Lift the tire you hit and spin it to see if you have a knot in that tire. __________________ John 82 Chevy Silverado 350ci/TH350

07-07-2014, 05:02 PM	#3
wjjeeper Registered User Join Date: Sep 2013 Location: Cold Lake, AB Posts: 402	Re: Shake a leg...or truck Check your rims for lost weights or mud packed in places. __________________ Follow me on Instagram http://instagram.com/ryno._b

07-07-2014, 09:50 PM	#4
old Rusty C10 Robert Olson Transport Join Date: Oct 2002 Location: recent transplant to NC USA Posts: 20,310	Re: Shake a leg...or truck or a bubble on the inside of the tires __________________ 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!!

07-07-2014, 09:54 PM	#5
mrolds88 Registered User Join Date: Jul 2011 Location: WV Posts: 946	Re: Shake a leg...or truck Also check the pinion bearing. Had a Suburban loosen the pinion nut once. WOW?? __________________ 72 GMC C2500 402/Th400 first truck (still have) 77 GMC C3500 CC dually Sold 70 C50 dump truck "Rusty" 87 K10 Suburban Sold 93 K2500 xcab 6.5TD 96 GMC K2500 Suburban 6.5 TD

07-08-2014, 02:22 AM	#6
andrewmp6 Registered User Join Date: Jan 2009 Location: Louisville,Ky Posts: 5,811	Re: Shake a leg...or truck It could be you knocked a weight off the wheel or bent the wheel,Or if you hit it hard enough could have bent a axle shaft.

08-31-2014, 02:37 PM	#7
lgvl Registered User Join Date: Mar 2013 Location: Rochelle, Il Posts: 63	Re: Shake a leg...or truck Sorry for not commenting earlier, i work at sea and had to go to work a few days after i posted this. As you can imagine i usually have more important things to do, like spending time with family, than working on my truck before leaving so didn't get much time to trouble shoot until now. Anyway, I removed both of the rear driver side tires and both have nice big bulges in them under the tread at one point. I'm guessing this is a result of the plies coming apart. So I will be going to get two new tires. My plan is to swap the two old front tires to the back with the other two good old tires and put the new ones on the front. How does that sound to everyone? I know matching tires on the rear of a dually is important. Thanks for the help everyone! __________________ '82 C30 3+3 Dually 454

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