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2014 Silverado 1500 rear end vibes

SpeedlabDan said:
You think the axle is bent? It kinda feels like it. I don't know what I'd do about that though
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They’re known for this issue. I had a neighbor who about gave away a GMC after he fought it for years and then traded it on a Honda Ridgeline…ugh…


I saw a few guys talking about it on the Silverado Sierra forum.
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One guy finally solved it with quality aftermarket axle shafts.
 
If the axle(s) are bent you should see it if you spin the wheel off the ground in neutral...unless the whole housing is bent, then it would show up as toe or caster that shouldn't be there.
 
folkenheath said:
If the axle(s) are bent you should see it if you spin the wheel off the ground in neutral...unless the whole housing is bent, then it would show up as toe or caster that shouldn't be there.
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I have put it in drive on stands mainly to see if the wheels were untrue. Nothing I could notice to the naked eye. Now this only happens over 70mph though. And I've changed the tires and rotors all the way around
 
If the axles were bent this should of always been there, unless they hit something.

Does it shake in 2WD with jackstands under the axle, and the tires doing the same speed? Be very careful...
 
folkenheath said:
If the axles were bent this should of always been there, unless they hit something.

Does it shake in 2WD with jackstands under the axle, and the tires doing the same speed? Be very careful...
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I don't want to take it up that fast on stands but yea it did kinda seem to start out of nowhere but right after I did the from shocks
 
Why not? Put it on solid jackstands, on concrete, so the tires are only a couple inches off the ground. And then you can run it through the gears. Just make sure to use the brakes before you put it back in park. (you'll be surprised how fast the tires stop with no load on them) Or if you forget the tires are moving because the vehicle feels stopped, and put it in park, you will get a horrible grinding/ratcheting sound, don't do that.

The stands have to be solid, solidly under the axle, and you have to remain in the vehicle just in case, with no one else near for safety reasons.

People do it every weekend at the race track to warm up the drivetrain and get the fluids moving. If something is out of balance, you know it.

Be sure to put the axle tubes on the jackstands, not the frame. If you droop the suspension you change the angles and then its not the same.
 
Instead of stands I prefer timbers like cut 4x4s or 4x6s or what ever you got. You can even build the jenga 2x4 ones that would hold it real solid.
 
folkenheath said:
Why not? Put it on solid jackstands, on concrete, so the tires are only a couple inches off the ground. And then you can run it through the gears. Just make sure to use the brakes before you put it back in park. (you'll be surprised how fast the tires stop with no load on them) Or if you forget the tires are moving because the vehicle feels stopped, and put it in park, you will get a horrible grinding/ratcheting sound, don't do that.

The stands have to be solid, solidly under the axle, and you have to remain in the vehicle just in case, with no one else near for safety reasons.

People do it every weekend at the race track to warm up the drivetrain and get the fluids moving. If something is out of balance, you know it.

Be sure to put the axle tubes on the jackstands, not the frame. If you droop the suspension you change the angles and then its not the same.
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I'd say I probably had it up to 45-50 on the axle stands but like you said stay in the driver seat it would be hard to see the wobble unless I felt it. I feelin pretty defeated at this point. I don't want to change axles. I had the wheels powder coated so I don't want to try to find new wheels even tho I tried the spare wheel on all corners with no change. I'm annoyed with gm 1/2 ton rears at this point. My 2002 had a junk rear that would ear bearings bc it had a trutrac in it.
 
Well I think you need to get it up to the speed at which the problem arises. If its shaking the truck going down the road, it should shake the truck on the stands. If it doesn't, then maybe it is in the front tires or something. Usually you can tell that by if you feel it in the steering wheel, or in the seat or cab.

When was the trutrac put in the 2002? Perhaps it wasn't done correctly, that doesn't mean the axle is junk.

Other than the little 7.5" 10 bolts that can't hold any power from the 80s camaros and G bodys, I don't have anything against GM axles really, and I drive pretty much all GM stuff.

It seems like you are changing stuff hoping it will fix it, when you haven't found the problem, which is expensive and time consuming.

Hang in there, you'll find the problem.
 
I drive all gm stuff even my Volt, I forgot to mention I wasn't real easy on my 02 silverado but those rears are known for being really robust.
I am changing parts in hopes of finding the issue but I think I'm done chasing it. I'll just deal with it
 
I apologize if I came off the wrong way there, you are really trying to get to the bottom of it, which I respect.

I know you'll find the issue if you want to.
 
Vibrations are the worst to find when it's not the common fixes. There once was a semi at my old work that had weird vibrations. I think it was pretty new still under warranty. They chased everything for weeks. Even got a fancy vibration tester with different sensors to monitor all over going down the road. Had engineers involved. Finally added a fishplate to double the top flange and vertical part of the frame rails from under the cab all the way back. Something about flexing and resonance I think. That one cost International a lot.
 
Truckman4life said:
Vibrations are the worst to find when it's not the common fixes. There once was a semi at my old work that had weird vibrations. I think it was pretty new still under warranty. They chased everything for weeks. Even got a fancy vibration tester with different sensors to monitor all over going down the road. Had engineers involved. Finally added a fishplate to double the top flange and vertical part of the frame rails from under the cab all the way back. Something about flexing and resonance I think. That one cost International a lot.
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That's pretty extensive. From what I understand I'm not alone on this. A buddy of mine that gets a Denali lease every couple years said every one of his start doin it and that's when he trades them in. Lucky sucker
 
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