A setback condition is found during an alignment. Which of the following could be the cause?

A setback condition in wheel alignment refers to a situation where one or more wheels are positioned back relative to the rest of the vehicle, impacting the vehicle's handling and tire wear. In this context, worn spring eye bushings can lead to undesirable movement in the suspension system. Specifically, these bushings are critical for maintaining proper alignment and control of the axle.

When the eye bushings wear out, they can allow excessive movement or play in the suspension, which can cause the axle to be misaligned. This misalignment may not only create a setback condition but can also affect the overall geometry of the suspension system. As the vehicle operates, any movement in the bushings can lead to changes in wheel positioning, leading to handling issues and uneven tire wear.

Other options, while related to suspension components, typically do not directly cause a setback condition. For instance, worn spring shackles, tie rod ends, or pitman arms can contribute to other alignment issues or handling problems but are less likely to specifically result in the type of misalignment characterized by setbacks.