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Shake or Vibration Issues

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beetle Enthusiast

beetle

Posted
Posted (edited)

Update: The Goodyear LS-2s were taken off and swapped for Michelins yesterday...I had time to run the truck today up on the highway. What a difference!! The truck runs nice, smooth and quiet....until you take it over 70MPH!!!! ITS STILL SHAKING :dunno: ........I talked to the dealer and let them know the vibrations are still present...in a weird way I actually feel bad for the dealer in that GM left them holding a leaky bag with SOME of these trucks. The dealer told me they did a traditional balance because they do not have the road force balancer.

 

Based upon my latest vibration test, I am convinced its something related to wheel speed however not necessarily the tires. (See the red spike on the attached pic in the 800 RPM range at 75mph.) That spike is on the X-Axis meaning it is a shake from left to right, (driver side to passenger side).

 

I may pop the wheels off and check the runout on the hubs and rotors with a dial indicator. Can anyone think of anything else that spins at wheel speed that I could easily check while I have it apart? I am open for suggestions!!

I think your on the right track by using a dial indicator, however I would check run out on the wheels first then the hubs. Check your driveshaft run out too if you can rig some kind of fixture. I bought a new Ford F150 in 1984, it had a nagging vibration, dealer was no help, I suspected the driveshaft, had a driveline shop inspect, it was bent and the balance weights were 180 degrees off, $100 took care of it. Only other issue I can think of would be a torque converter out of balance.......best of luck.

Edited by beetle
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csckickass
csckickass

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mafd2
mafd2

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DALaws
DALaws

Well I have some good news and bad news about my truck vibrations. Good news is that my truck has a significantly less vibration at speed. The bad news is my truck has significantly less vibration. Fo

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Stex Senior Enthusiast

Stex

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I have a friend that has the driveshaft balanced on each new car he gets. I do such if the new tires, true and balance and new shocks do not result in a good smooth vibration free ride.

Arnoldthepig Enthusiast

Arnoldthepig

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Posted

I think your on the right track by using a dial indicator, however I would check run out on the wheels first then the hubs. Check your driveshaft run out too if you can rig some kind of fixture. I bought a new Ford F150 in 1984, it had a nagging vibration, dealer was no help, I suspected the driveshaft, had a driveline shop inspect, it was bent and the balance weights were 180 degrees off, $100 took care of it. Only other issue I can think of would be a torque converter out of balance.......best of luck.

I know it came up in this thread that there were possibly a batch of bad wheels or driveshafts. I forgot to mention that I did check the runout on the driveshaft and wheels and they were all spinning true. Obviously I wasn't able to check the balance on the driveshaft at home, but since my tires have been replaced all is well! I got a chance to get out the past few days and put some miles on the truck with the new tires and rebalance....its still good no vibrations!

beetle Enthusiast

beetle

Posted
Posted

I know it came up in this thread that there were possibly a batch of bad wheels or driveshafts. I forgot to mention that I did check the runout on the driveshaft and wheels and they were all spinning true. Obviously I wasn't able to check the balance on the driveshaft at home, but since my tires have been replaced all is well! I got a chance to get out the past few days and put some miles on the truck with the new tires and rebalance....its still good no vibrations!

Glad you found the solution.

Szyikowski Enthusiast

Szyikowski

Posted
Posted

My local dealer fixed a vibrating truck by replacing the front right cv joint.(I think that what they are still called) Unfortunately that wasn't the case with my truck, but may be with those of you who feel the vibration in the steering wheel.

JasonOKC Enthusiast

JasonOKC

Posted
Posted

Well, my truck is still in the shop for the vibration. Guess they will do software update on while its there. News said that there has been 8 fires so far.'mostly while ideling in frigid temps.

But back to the shake. The loaner I have has 20" continentals on it. Vibe hasn't been bad at all till this morning on my way to work. About 75 mph it was shakin pretty bad. Put it in neutral. That didn't change anything. Shop foreman at the dealer told me last week that the tires get flat spotted sitting overnight and have to get heated up. My 2010 didn't vibe in the mornings. Someone please edumicate on this

svtkidd23 Enthusiast

svtkidd23

Posted
Posted
Well, my truck is still in the shop for the vibration. Guess they will do software update on while its there. News said that there has been 8 fires so far.'mostly while ideling in frigid temps.

But back to the shake. The loaner I have has 20" continentals on it. Vibe hasn't been bad at all till this morning on my way to work. About 75 mph it was shakin pretty bad. Put it in neutral. That didn't change anything. Shop foreman at the dealer told me last week that the tires get flat spotted sitting overnight and have to get heated up. My 2010 didn't vibe in the mornings. Someone please edumicate on this

That's bs... My mustang with soft drag radials in summer don't get flat spots sitting for a month

 

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svtkidd23 Enthusiast

svtkidd23

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Trucks in shop now. First oil change tire rotation.. Fixing alignment

 

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svtkidd23 Enthusiast

svtkidd23

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Posted
Do you have vibration probs? Do you have vibration probs?

 

Yuuppp

 

72mph.

 

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BringTheRain403 Senior Enthusiast

BringTheRain403

Posted
Posted
Well, my truck is still in the shop for the vibration. Guess they will do software update on while its there. News said that there has been 8 fires so far.'mostly while ideling in frigid temps.

But back to the shake. The loaner I have has 20" continentals on it. Vibe hasn't been bad at all till this morning on my way to work. About 75 mph it was shakin pretty bad. Put it in neutral. That didn't change anything. Shop foreman at the dealer told me last week that the tires get flat spotted sitting overnight and have to get heated up. My 2010 didn't vibe in the mornings. Someone please edumicate on this

 

This definitely happens. Not so much in the summer but definitely the winter. Should stop after a couple miles...

 

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20L8TSierra24 Senior Enthusiast

20L8TSierra24

Posted
Posted (edited)

My dealer gave me a bunch of shit today about having to test ride the truck and it won't be looked at till Thursday or later because of my vibration... And get this, they said mine was the first to come in for this reason... yea...

 

I ended up going straight to Goodyear and they force balanced the tires and found one wasn't able to be balanced at all. Plus 3 out of the 4 were WAY off. Tire will be in tomorrow and replaced under warranty without going through the dealers crap. The tire machine said the tire was balanced, but then they ran it they told me to watch because it was so bad. The machine was literally shaking laterally side to side and the machine said the tire was good at the same time... Even with the 1 tire still terrible, my vibration is almost gone, and tolerable how it is. In and out in 30 minutes and I hope this solves my problem.

 

Take your trucks to Goodyear direct and you will be taken care of immediately and then you can almost rule out the tires if your still having problems.

 

My vibration was between 72-85 mph

Edited by 20Bowtie14

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    • Chuck FB
      Tire psi

      By Chuck FB · Posted

      I will admit I haven't experimented much with pressure drops beyond the numbers I put in and part of that is that the numbers I used are fairly low and then found out it would trigger regardless at that 35 psi. Having said that I had tried before had changed the placard pressures and being that I have a 1 ton set to 80 on the placard for the rear I believe it triggered close to 60, the front I don't recall now for sure but thought maybe it could get close to 45 from that factory 60 placard pressure. So I never did figure out if it was a number of psi from placard pressure to the alarm or a percentage of the total placard number as some figured it was like a 25% drop from placard pressure would trigger it. So as to try and answer your question, I believe I set the placard pressure on the front to 47 or so and while I run the front tires at 40, they have dipped below that some if its colder and I haven't put "winter air" in yet and never once have had the front alarm go off. I would say that the answer your looking for is no, that if you set your placard pressure to 45, you have a certain amount of room to drop below that pressure before the alarm will go off.    The pressures you decide to run in your truck, that ends up being what makes sense to you based on what your carrying in your truck or if towing, then have to bump them back up to something that will carry the load in the rear and the fronts typically left at the same pressure. It all comes down to that chart I put the link to and using an accurate roadside scale to be your guide, both unloaded and then loaded to know your minimum safe pressures.    I just wish GM would allow a person to change the readings for the tire pressures to the English system of pounds as I have to look at that goofy metric reading that will never ever jive in my head and will go over and change it just to figure out what they are if need be and then change it back. 
    • TrueBlue
      No Software Updates - Old Build

      By TrueBlue · Posted

      That part I understand, that the dealer can do it. But I'm not understanding why updates that were available to the truck since it left the factory, or the dealership originally, would not still be available to it without dealer intervention.   I'm thinking along the lines of recalls. They stay available until they are completed. Why not updates as well, especially since some of those can be safety related also?
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      Tire psi

      By jgaudet99 · Posted

      That's good to know, but I don't think I'll even be running them under 45 in the rear  unless it's on the sand or something but will only be for a short distance anyways!    I didn't read all the instructions in the booklet yet, but do you know let's say I set the rear psi on the placard to 45, will the warning light come on soon as it drops under 45 or is there a percentage it has to drop from the set value before the warning light is triggered?
    • newdude
      Would this CV Shaft be bad?

      By newdude · Posted

      That's bad.  Like, its probably destroying the stub axle the CV slides into.   Do you have a proper lift installed with differential lowering brackets?  Did you install AT4/Trail Boss factory CV axles?  
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      Would this CV Shaft be bad?

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      Hot? New Jersey? Today? I was working on my old 2000 Silverado 1500 today. Believe me, it was boiling hot today. As it has been.

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