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Shake or Vibration Issues

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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

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07Softail Senior Enthusiast

07Softail

Posted
Posted

So, it sounds like machining the axle flanges has worked for several people? Correct, problem goes away completely?

 

If so, has anyone sent Mary Barra the news? If it works, then GM would finally have a solution and we can all stop dicking around with it

I sent and email and videos to AAM which is who Manufactures the Axle assemblies and drive shafts for these trucks. No response and no surprise! Mine feels perfect but my OCD is making me wanna check to OD of the ring gear as a few have had gears replaced and it seemed to fix their particular issue.... I will do so when weather clears up

 

RT

Darth_Vader Enthusiast

Darth_Vader

Posted
Posted

2 degree's

 

RT

Okay, I'm running 3 right now but think I'll keep it as is until I get the rest done. Were the Yukon axles a direct swap or did you need new shaft bearings? Thinking I'm going to replace them regardless at this point as it's the last OE piece on my trucks rear drive.

abominable z71 Enthusiast

abominable z71

Posted
Posted

I sent and email and videos to AAM which is who Manufactures the Axle assemblies and drive shafts for these trucks. No response and no surprise! Mine feels perfect but my OCD is making me wanna check to OD of the ring gear as a few have had gears replaced and it seemed to fix their particular issue.... I will do so when weather clears up

 

RT

RT,

 

Does it appear the outer portion of the hub flange is never turned after being forged, like they figure it's "round enough"?

07Softail Senior Enthusiast

07Softail

Posted
Posted

Okay, I'm running 3 right now but think I'll keep it as is until I get the rest done. Were the Yukon axles a direct swap or did you need new shaft bearings? Thinking I'm going to replace them regardless at this point as it's the last OE piece on my trucks rear drive.

MRW412 replaced his stock axles with yukon axles not me, I think my post might have looked like i did. They are a direct swap though. I turned mine down on my lathe and got em trued up nice.

 

RT

 

RT,

 

Does it appear the outer portion of the hub flange is never turned after being forged, like they figure it's "round enough"?

It looked pretty crude as far as machining goes but yes the very outer edge was raw forged on one side.

 

RT

07Softail Senior Enthusiast

07Softail

Posted
Posted

Do this guys.... get a visual point of reference for me was the top of the e-brake shoe and watch the video in super slow .25 speed and you can see how out of round it is and actually has a couple of dips in it. CRAZY CRAZY!

 

RT

Pinnacle Enthusiast

Pinnacle

Posted
Posted

Funny, cause tires solved my issue 95% of the way...

 

Sent from my SM-N920V using Tapatalk

Ive seen several guys on other GM forums say its fixed 90 95%, what does that mean? It has to be 100% Its gone or its not.

 

Its hard to figure this out because it happens from 100 to 30k+ miles on various vehicles. If it was something like a axle flanges it should happen from the first few miles, but it doesn't. So damn frustrating.

Wrench589 Enthusiast

Wrench589

Posted
Posted

Ive seen several guys on other GM forums say its fixed 90 95%, what does that mean? It has to be 100% Its gone or its not.

 

Its hard to figure this out because it happens from 100 to 30k+ miles on various vehicles. If it was something like a axle flanges it should happen from the first few miles, but it doesn't. So damn frustrating.

 

You make a good point. If it is the axle flange TIR, it would be present immediately, and always there. It would go away for a while, then come back.

 

Moreover, it would be present at all speeds, just at a different amplitude - the faster the speed, the greater the amplitude. In fact, the amplitude would go upswing the square of the rpm. I can't come up with a scenario that any mechanical "defect" would come and go as most people have observed, other than the coupling effects between the right and left side of the vehicle. When the unbalance is in phase, it adds t each other. When out if phase, they cancel. And the right and left side wheel/ties will change phasing as you go around corners. Still, enough to account for the observations? Hard to say.

 

I think the more plausible situation is that there is an inherent natural frequency in the vehicle that is excited by many things - out of balance driveshafts, out f balance wheels/tires, excessive road force in the tires, even unbalance in the axles. You can't get rid of all those possible excitation forces completely, as it's not feasible to perfectly balance something. But if they are low enough, the natural frequency is not excited. Until the tires wear a bit.

 

Of course, pure conjecture on my part! :)

C6Bill Enthusiast

C6Bill

Posted
Posted

I think the more plausible situation is that there is an inherent natural frequency in the vehicle that is excited by many things - out of balance driveshafts, out f balance wheels/tires, excessive road force in the tires, even unbalance in the axles. You can't get rid of all those possible excitation forces completely, as it's not feasible to perfectly balance something. But if they are low enough, the natural frequency is not excited. Until the tires wear a bit.

 

Of course, pure conjecture on my part! :)

 

Well said.

 

And it is all transferred to the driver through that wonderfully stiff frame.

Snoringbear Enthusiast

Snoringbear

Posted
Posted

Well said.

 

And it is all transferred to the driver through that wonderfully stiff frame.

 

An excellent hypothesis by Wrench589. And, agree with you C6Bill about the frame as its been my guess from the get-go that the frame and along with the thinner gauge sheetmetal used in this generation as Wrench stated "excites" or amplifies the conditions created by out of spec parts. What's odd though (to me) is that I've read that for the new generation 2018 truck GM is designing an even stronger and stiffer frame. However, I have also read that GM will be utilizing primarily aluminum to skin the truck. If true, maybe the aluminum sheet metal might mitigate the vibration? Guess we shall see. 2018's will be out you know it....

C6Bill Enthusiast

C6Bill

Posted
Posted

Just a guess but I'm thinking they will leave the floor of the bed steel, that way they don't have to explain away the commercial bashing Ford for that lol

  • Like 2
Austin66 Enthusiast

Austin66

Posted
Posted

Has anyone actually jacked up the rear and run it and seen/heard/gauged this so called warped axle flange?

Snoringbear Enthusiast

Snoringbear

Posted
Posted

Just a guess but I'm thinking they will leave the floor of the bed steel, that way they don't have to explain away the commercial bashing Ford for that lol

Lol, yeah, thought about that. I've read that although Ford is advertising their weight savings by using aluminum is 700 lbs the actual net net savings is about 100 lbs. I think that's where the stronger/stiffer frame comes into play on the 2018 models. I know that Ford has switched to an aluminum skin on their Super Duty line and has also used most of their weight savings on beefing up the frame to compensate. Btw, had lunch at Frisco Babes a few days ago. Thought about you, ate a chicken wing in your behalf :)

Snoringbear Enthusiast

Snoringbear

Posted
Posted

Wow, this thread is coming up on 700 pages. Surely this is a forum record? If so, rdnckhntr94, as our beloved moderator, shouldn't you commemorate this milestone is some fashion :) ?

  • Like 1
MRW412 Enthusiast

MRW412

Posted
Posted

Has anyone actually jacked up the rear and run it and seen/heard/gauged this so called warped axle flange?

Yes, read back a few pages.

 

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