What effect does worn walking beam bushings have on a truck's performance?

Worn walking beam bushings primarily affect a truck's handling and stability by causing axle misalignment. When the bushings deteriorate, they no longer maintain the proper alignment of the axles, which can result in uneven tire wear, compromised suspension performance, and difficulties in steering. This misalignment affects how the vehicle tracks on the road, leading to a less stable ride and can put additional strain on various components of the suspension system.

Proper alignment is crucial for ensuring that the tires make optimal contact with the road surface, which in turn affects handling, braking, and overall vehicle safety. When bushings are worn, it can also result in increased play or "slop" in suspension movement, further contributing to performance issues.

As for the other options, centrifugal force isn't significantly impacted by the condition of walking beam bushings; rather, it is a natural force acting on the vehicle during motion. Tire pressure isn't directly altered by the state of the bushings, although misalignment can lead to uneven tire wear that might affect tire pressure over time. Increased fuel consumption might result from poor alignment due to increased rolling resistance, but it is not the most direct effect of worn walking beam bushings compared to axle misalignment.