Chasing a vibration

[Annolino122]

Been chasing a periodic vibration for over a month now. Steering wheel doesn't vibrate, it's been aligned and drives straight, no squeaks, rattles, knocks, nothing.

Happens at a variety of speeds, not just the tire resonance speeds (40-55mph).

2021 with 51k miles

ICON Stage 7

35" tires (Toyo AT3) on 17 ICONs

I've gotten the wheels/tires balance 3 times, even having them undo and redo them, road force balance, etc

I have upgraded linkage and arms in the back, so I did the heim joints and bushing rebuilt and replaced.

Grease the drive shaft

Brake pads have been replaced around 5k miles ago

Its not going away, all I can think of is the wheel bearings or the rotors are somehow already shot but they don't show any signs, no wiggle or warped parts

Any ideas of what else it might be? Maybe I think it's the back instead of somewhere else?

I am at a complete loss besides what I mentioned or maybe the tires are out of round (so they'll balance fine but won't drive okay)

 

[jp.vegas]

When's the last time you had your shocks checked/rebuilt? Bad shocks can cause vibrations.

 

[CutthroatSlam]

If you’ve got a wobble, it’s in the front end. Start with a close inspection for play/wear with the tie rods, inner and outer. Also check upper and lower ball joints.

37” tires over the highway and you asking for problems, JMO.

 

[DarrenJ]

I had a vibration that I chased down to a bearing in the transfer case.
Details here: ECGS bushing need advice! | Toyota 4Runner Forum [4Runners.com]

It is a very common problem, especially with lifts.

 

[DarrenJ]

I had a vibration that I chased down to a bearing in the transfer case.
Details here: ECGS bushing need advice! | Toyota 4Runner Forum [4Runners.com]

It is a very common problem, especially with lifts.

 

[lehiguy]

I have had (in a 4th Gen) two sources of a growl, not a quite a vibration. One was a rear axle bearing, the other from the front left differential bearing that supports the CV shaft. I understand this to be very common. It's easy to verify this by going into 4 high. If the the problem goes away, you found your issue.