What is the function of the track bar?

1 Answers
DianaLee
07/30/25 12:18am
The function of the track bar is to suppress lateral swing between the frame (vehicle body) and the rear axle. Here are the specific details: 1. Lateral swing: The solid axle structure, also known as the floating axle, has no direct connection points with the frame. It is entirely constrained within a relatively fixed area under the chassis by various control arms and springs. Taking the classic five-link solid axle structure as an example. 2. Upper and lower control arms: There are two upper and two lower control arms on each side, serving two main purposes: one is to fix the longitudinal (front and rear) position of the rear axle, and the other is to limit the axial rotation of the rear axle. The upper and lower control arms address the front and rear positioning of the rear axle and the angle of the driveshaft. The vertical position of the rear axle relative to the frame is determined by the springs. This leaves the lateral (left and right) positioning, which is resolved by the track bar.
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