2007 Toyota Tundra suspension problems

Tl*the contact owns a 2007 toyota tundra. The contact stated that his vehicle vibrates while driving between 60-70 MPH. The vehicle was taken to the dealer for a diagnosis on october 12, 2007, in which two wheels were rotated and balanced. The dealer's invoice did not specify whether the front or rear wheels were balanced. The vehicle was taken back to the dealer several times, because the vibration persists.

Tl*the contact owns a 2007 toyota tundra. While driving approximately 70 MPH, the vehicle vibrated excessively to the point where the accelerator pedal bounced up and down on the contact's foot. The failure was most noticeable while driving on freeways. The manufacturer stated that they were aware of the failure, but could not provide a solution. Through research and professional consultations, the failure was determined to be the harmonic vibration caused by the expansion joints.