Jump to content

Shake or Vibration Issues

Silver space ship
 Share

Recommended Posts

Snoringbear Enthusiast

Snoringbear

Posted
Posted

I'm having an Air Lift system installed January 12th. My truck doesn't have the notorious "Chevy Shake". So, can't comment on that. I'm having the install done for towing. However, I've talked to some people who've had the install done and they say that when driving about with no load and with a minimal amount of air in the bags, just enough to take the weight slightly off the rear springs, it reduces jounce that is common with leaf springs. If so, that alone will be worth the install as the soil here in the DFW area is black gumbo and expands and contracts significantly depending on rain and drought conditions causing the roads to buckle badly. Anyway, I'll give feedback on the system once I use it some, make a tow, etc.

  • Replies 12.9k
  • Created
  • Last Reply

Top Posters In This Topic

Popular Days

Top Posters In This Topic

Popular Days

Popular Posts

csckickass
csckickass

Well folks, I did it. After all the failed attempts at the Chevy dealer I traded it in for a 2015 Ram 1500 Larame. I have to agree with the other folks on here that have done the same thing, it was th

mafd2
mafd2

Apparently you and the other customer reps don't care. If you or GM would care y'all would put more effort in the matter. Just coming on the forum and stating the same repetitive posts and being a 3

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

Posted Images

Schmidt152 Enthusiast

Schmidt152

Posted
Posted

Yeah mine said that in sorts and I called bullshit when I made him ride with me in an on the lot used 2012 and it was perfect! I do have something else I'm gonna try and that is to take a diff carrier with ring gear installed and check runout on the outer portion of the gear and then check balance. Some have stated the ring gear was their issue and gm did a gear change. Soooooo on to the next step. BTW i found that the out of round axle flanges that I just tested had over 18 grams of weight that i turned off of the axle that i trued up. That's a helluva lot!

 

RT

RT are you still having issues with vibration? I thought yours was resolved?

Happy New Year Everyone

Mark Diedrich Enthusiast

Mark Diedrich

Posted
Posted

 

 

Just to update everyone on the rumble strip vibrations I was experiencing. I got the truck back 2 days ago and so far so good. Here is what the dealer reported:

 

Road tested vehicle and found possible tire/wheel vibration. Removed all four wheels and road force balanced to find one tire out of range. This tire was replaced and then vehicle was road tested again. The vibration improved but was not eliminated. Checked for TSB's and none were found that directly addressed this concern. Contacted TAC and TAC suggested to utilize TBS PIP5149B. I followed all instructions of this TSB, checking for excessive spark retardation and connecting rod oil squitter condition. There were no conditions observed. TAC then directed me to utilize DOC ID#2102430 where I checked the operation of the control solenoid within the transmission. When commended to the on position, It registered full pressure and when commanded off it registered 0 pressure. After completing all tests found that TCM could not be 'pulse-width' tested, only command on or off. With these measurements we determined that the TCM was sending an erratic signal causing the torque converter to be commanded erratically. This caused potential damage to torque converter. Therefore, I replaced the TCM (Signal) and torque converter (damaged internally). Road tested vehicle; now operating to GM specifications with no vibration when tested under the original conditions.

 

I have also noticed that the "floating Tac" condition I had earlier is no longer present.

Mark Diedrich Enthusiast

Mark Diedrich

Posted
Posted

Brandon, I think you might be my hero!

Mine feels like rumble strips on occasion and my TAC bounces on occasion to with the cruise!

I'm going to take your diagnose into the dealer.

And drives perfect the rest of the time....

Jesse Davidson Enthusiast

Jesse Davidson

Posted
Posted

Yeah mine said that in sorts and I called bullshit when I made him ride with me in an on the lot used 2012 and it was perfect! I do have something else I'm gonna try and that is to take a diff carrier with ring gear installed and check runout on the outer portion of the gear and then check balance. Some have stated the ring gear was their issue and gm did a gear change. Soooooo on to the next step. BTW i found that the out of round axle flanges that I just tested had over 18 grams of weight that i turned off of the axle that i trued up. That's a helluva lot!

 

RT

 

 

 

18 grams? That's like a half ounce of "Pot" A 5,000 pound+ Truck with 1/2 ounce of pot on one side vs the other? Really, I am going to the garage to burn one because now I have officially heard it all. I can't comment any more on this sorry@

18 grams of weight on an axle flange translates to roughly 25lbf based on 2000RPM, which will increase exponentially as RPM increases

07Softail Senior Enthusiast

07Softail

Posted
Posted

RT are you still having issues with vibration? I thought yours was resolved?

Happy New Year Everyone

At 100-118 a little shimmy and up around 140 it was a pretty good vibration but after cutting the axles it's damn near perfect. The driveshaft truing fixed 96% of it. Sorry for getting pissy with the Pot smoker but I'm not taking this subject lightly, and further more someone questioning my competency as a 30 year Machinist kinda set me off a bit. As I stated in C6Bills post I will be checking the ring gear runout not that mine needs any more tweaking if it's off I will clean it up and if not i'm satisfied. Just trying to help everyone out guys.

 

RT

07Softail Senior Enthusiast

07Softail

Posted
Posted

 

 

18 grams of weight on an axle flange translates to roughly 25lbf based on 2000RPM, which will increase exponentially as RPM increases

I knew the pot smoker couldn't figure that one out, it's some people you just can't reach! I worked at an automotive machine shop for 10 years and 4-7 grams on a connecting rod and crankshaft counterweight was ok by factory standards but not in the HP engine building world.

 

RT

  • Like 1
Schmidt152 Enthusiast

Schmidt152

Posted
Posted (edited)

I think most of us appreciate the information, RT. This problem sucks and I'm finding myself wasting roughly 2 hours a day researching. I'm still waiting on a GM engineer to get back to me.. Only thing that I noticed that differed from your experience is that my truck is perfectly smooth 55-60 MPH. So I'm wondering if i'm having a different problem than you. I have noticed the "floating Tac" that was just mentioned while driving down the road. Even at an idle it will bounce and my truck will shutter occasionally, which maybe another problem itself. I'm forwarding this information to my dealer as well.

Edited by Schmidt152
Rolling Thunder Enthusiast

Rolling Thunder

Posted
Posted

Same issue just at different MPH because of the 4 different gear ratio options we have.

 

RT

 

Could it also be the different gear ratios accompanied by different flange imbalances? In other words the same gear ratios vibrating at different speed because the flanges out-of-round varies?

MRW412 Enthusiast

MRW412

Posted
Posted

Here's an update on my truck since it has been 2 weeks since I installed Yukon Gear rear axles. The truck has been shake free since installing them. I have driven on multiple smooth highways at 70+ mph and no shaking.

Here's an update on my truck since it has been 2 weeks since I installed Yukon Gear rear axles. The truck has been shake free since installing them. I have driven on multiple smooth highways at 70+ mph and no shaking.

  • Like 1
07Softail Senior Enthusiast

07Softail

Posted
Posted (edited)

 

Could it also be the different gear ratios accompanied by different flange imbalances? In other words the same gear ratios vibrating at different speed because the flanges out-of-round varies?

It sure could.

MRW412
Here's an update on my truck since it has been 2 weeks since I installed Yukon Gear rear axles. The truck has been shake free since installing them. I have driven on multiple smooth highways at 70+ mph and no shaking.
That is awesome.... I really think we are narrowing this vibe down!
RT
Edited by 07Softail
Schmidt152 Enthusiast

Schmidt152

Posted
Posted

Here's an update on my truck since it has been 2 weeks since I installed Yukon Gear rear axles. The truck has been shake free since installing them. I have driven on multiple smooth highways at 70+ mph and no shaking.

Here's an update on my truck since it has been 2 weeks since I installed Yukon Gear rear axles. The truck has been shake free since installing them. I have driven on multiple smooth highways at 70+ mph and no shaking.

Could you give more specifics about your symptoms? Describe the vibration and location in the cab? Was it more noticeable in the steering wheel or seats or just a vibration throughout the truck in general?

sdeeter19555 Senior Enthusiast

sdeeter19555

Posted
Posted

After reading about the ring gear fix, wonder if they were cut right to begin with, not runout but actual tooth to tooth contact? Maybe not hardened correctly, some softer spots?

 

Interesting topic to follow...

 

Sent from my SAMSUNG-SM-G900A using Tapatalk

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
 Share
Go to topic listing

  • Latest Articles

  • Posts

    • Grumpy Bear
      AFM Experience

      By Grumpy Bear · Posted

      Question @diyer2 on this line if you please. Are you saying the shudder is the system turning on and off at the frequency of the shudder? Guess I'm asking if you are saying you have seen it do this with the bi-direction scan tool in graph mode? If so have you been able to discern the 'trigger'. Something is telling to cycle rapidly.    My truck just started doing this recently. 197K on the clock. My response has been M5 anything under 55 mph. I treat it like a lugging stick shift. Gear down and let it spin a bit. Engauge M5, then tow mode and then M6 lets the trans stay in 5th but the AFM is active. Smooth like Skippy.    My thought was that as a machine ages the friction gets lower and as the system is load based, the lower friction would allow it to turn on at ever lower rpm until it reaches the lugging point. And yes I am ignorant of any minimum rpm requirement for the system. If you know that would be useful information.    As you know I run a Scan-Gauge II which allows me to watch the On/Off of the signal to the VLOM. While in the shudder mode I'm not seeing is cycle at that frequency or at all for that matter outside the triggers @newdude posted a few years back. Now is it possible that the refresh rate isn't fast enough to catch it? Maybe. It is why I asked my first question about graphing and trigging parameter.     As we have observed from members here the failure point is all over the map miles wise as you note yourself in your opening post. That by itself begs a few questions like fellows that comment on these lifters failing even after the system has been disabled. Long after. 😬   https://www.enginelabs.com/news/tech-tips-replacing-ls-active-fuel-management-lifters-with-melling/   The Gen5 lifters operate the same as the LS versions. In fact they are the same lifter.    https://www.enginelabs.com/tech-stories/sorting-out-gen-v-lt-lifter-failure-with-a-simple-valvetrain-fix/        
    • SwitchBladeSierra
      14-18 Sierra 1500 Heated Steering Wheel Help

      By SwitchBladeSierra · Posted

      UPDATE 2: Steering wheel control backlights and control of the cluster can supposedly be achieved by adding a wire to pin 20 of the cluster and tapping it to pin 2 of the main clock spring harness. I'm going to give it a shot - will update  
    • newdude
      Seems to be Missing a lot of Updates

      By newdude · Posted

      GM Global A pickups 2019-2022 can do OTA programming for the radio.  GM VIP (GM Global B) can do OTAs for almost every module on board.  So a 2022.5 and newer pickup can do OTAs for recalls like the 2.7 fuel flow recall.  EVs get OTAs that improve one pedal driving, radio issues, HVAC issues, updated battery management software, etc.     So age of the vehicle/what GM electrical platform its on will alter what amount of updates can be pushed on OTAs.  
    • Blade8971
      Upgrade to a 2026 AT4 with the 3.0L Duramax

      By Blade8971 · Posted

      Thank You.   So far my new ride is making me look like a genius for going with the 3.0L, as my first fuel refill occurred over three weeks from when I took delivery.  This engine combination is very amazing.  So far no issues and had not done a regen yet.
    • Chuck FB
      Correct way to service 2024 l8t allison trans?

      By Chuck FB · Posted

      I am curious as to how much fluid you put back in the transmission ( assuming you had replaced the filter to compare to my findings ) and then went through the process of warming up the trans before pulling the check plug to drain out the excess and if you measured how much came back out.    I just found it surprising that some claimed a certain amount less fluid being put in and then draining some back out. The attitude of the truck as per if the surface is level and how the trucks stance is would make quite a difference since the check plug is right at the front of the transmission. 

  • GM-Trucks.com Clubs

  • Popular Contributors

×
×
  • Create New...