Can a bad track bar cause rear axle shake?

A bad track bar can contribute to axle shake, or what in mechanics terms is referred to as driveline vibrations but is not typically the sole cause. Driveshaft misalignment, suspension and steering components with excessive clearances and/or damaged or missing components would also likely be at play if a track bar is determined to be a factor when dealing with a driveshaft/axle vibration or shake concern.