Shaking or shuddering that occurs primarily during acceleration can sometimes originate in the drivetrain. Driveshafts, U-joints, CV axles and other components may behave differently when torque is applied, making a problem more noticeable under load.
The symptom does not identify the failed part by itself. Certified Transmission in Bellevue can inspect the drivetrain and determine where the vibration is coming from before recommending repairs.