For the past few weeks my 4Runner has been making the most annoying buzzing noise from the lower dash/steering wheel area. The noise starts around 70 mph and is at its worst around 75. I have tried multiple solutions and cannot solve it. Tires rotated and balanced and didn't make a difference. Today I took the entire lower dash off and tried to feel around for the vibration. Since it only happens at high speeds it has been very hard to diagnose. It also is not as loud when I pull down on the steering wheel. Any ideas? Thanks in advance for the help!
Here's a video of the noise:
YouTube