A trunk shaker harvester includes a shaker assembly with four synchronized shaker drives. The shaker drives are mounted on a frame of trunk engagement members. The shaker drives include offset weights that are synchronized so that all are directed to the left or right side at the same time. However, the front and rear motors on each side of the drive rotate in the opposite direction so that the weights face toward or away from one another at the same time and cancel out longitudinal forces.
