70+ MPH Vibration! Dealer wont fix! Ideas??

Any updates on this? My 2016 Sequoia is doing this. Thanks!

 

I had an issue like that before on another vehicle, it was the driveline (driveshaft), generally they are balanced perfectly but on occasion they aren’t as balanced as they should be. Also, just like a wheel, sometimes the weights that are attached to some drivelines fall off and cause a wobble at higher speeds.
Just my .02

 

FYI, this thread is 6 years old…

 

Yeah I know just hoping someone can help this is issue is driving me crazy lol

 

LOL. I just test drove a 23 CC, it vibrates and shimmy's a little too, my 23 Sienna will slightly vibrate at 45mph, my pervious 11 sienna vibrates the worst. Maybe it's a Toyota thing! About to test drive a 2020 Platinum this week, hopefully it doesn't shake like my 18. But again, our Ascent is smooth sailing on the same roads, go figure.

 

I get some vibration 45mph+ in the AM when the truck is still cold. Notice it does NOT vibrate after its warmed up at high speeds. That at least tells me its probably cold tires (i have no idea if thats true but why not)