Had this same problem on my FJ. At speeds in between 60 to 65 MPH there is a wheel vibration that causes the steering wheel to shimmy. Best way to describe the feeling is an out of balance wheel. On my FJ the problem was never actually fixed completely. Having the wheels road forced balanced reduced the effect to a tolerable level. I always just assumed it was due to the larger and heavier tires I ran on the FJ.
With the 4Runner its a different story, the truck is all stock with only 400 miles on it so the vibration should not be happening. I'm going to the dealer today to have them look at it and I'm insisting on road force balancing the wheels. Hopefully it's something stupid like a defective tire or out of balance wheel.
With the 4Runner its a different story, the truck is all stock with only 400 miles on it so the vibration should not be happening. I'm going to the dealer today to have them look at it and I'm insisting on road force balancing the wheels. Hopefully it's something stupid like a defective tire or out of balance wheel.