Vibration @ Hwy Speeds

I would loosen and re-tourque your pinion flanges. Do you have play between ftont and rear flange of TC?

 

I had a weird 35-45 mph vibration. Back tc flange was hair loose and one u joint needed a ton of grease to push through all the seals. Grease would only weap out of one. Caught it early. Axle hop maybe?

 

Aftermarket wheels that aren't hub centric?

 

We’re gonna find out soon if my problems are my tires, picked up some 4Runner wheels and tires. Gonna give them the factory trash edition spray paint.

 

In my hunt to solve the problem I got the wheels road force balanced and rotated again, replaced the carrier bearing and no change. I'm not sure where you all are feeling it most but mine definitely seems to be most noticable in the floor with the steering wheel just seeming to resonate lightly with that shake as opposed to being a wheel shake.

I'm leaning heavily towards it being my aftermarket CVs but I'd like to rule out most other things before swapping them out again. I still have my OEM axles but they're pretty rusted and have torn boots so they'd be for testing purposes only.

My other thought would be engine/trans mounts. Anyone else run down the rabbit hole?

 

So new tires definitely solved the vibration problems but I’m not sure if cupped tires were a symptom of greater underlining problem, only time will tell.

 

Welp... there you go. It is the tires/wheels after all. Not the first time, won't be the last.

Now ultimately it's only a matter of figuring out: Is it that the tires are cupped, is a wheel bent, or is the shop you chose just really shit at balancing things?

There's a myriad of ways to handle this. Now the old wheels are off, some options you may want to explore:

• You could swap on two of the original wheels/tires onto the front (only two, on the front specifically, front tires out-of-balance typicall cause more shimmy). Go drive around at 60mph+, does it shimmy? If not, swap the other two on, repeat, does it shimmy? Maybe you can isolate the problematic wheel(s)/tire(s).
• You could pretty easily check for cupping, visually inspecting for high/low spots on the tire, or use a straight edge. If the tires were still mounted and you had a slab of chalk, you could chalk them and go drive around, anywhere there's a low spot, the chalk will remain. It's harder to spot cupping on a tire with lots of tread. I don't remember if you said how much wear your tires have.
• You could try balance beads, @des2mtn was talking about them recently. Remove your valve core, dump them into your tire, and they auto-balance at speed (video below). If balancing is your issue (not cupping or bent wheel), this may be a cheap solution?
• If no luck, you could take a minute to clear all the weights off, remove their adhesive, wipe all surfaces down with oil, then take them to another shop for road-force balancing. Maybe pick an offroad shop, specifically, if one exists near you?

https://www.youtube.com/watch?v=UZQXPLfOPXc​

 

The front tires were definitely cupped closer to the middle of the vehicle, the front driver had an uneven wear like it was hopping. Truck drives way smoother now, I think it’s time for an alignment though. I swapped all wheels plus tires. Didn’t take them to a shop jet put them on my

 

Yeah, that's some pretty wicked toe wear, and definitely cupped on the outer edge too. Notice in that outer edge that's worn smooth, on two of three middle lugs you can see the tread lines, but there are no tread lines visible elsewhere.

You definitely need toe corrected. And