Trailing Arm
A suspension link that connects the wheel hub to the chassis, running parallel to the vehicle's length to control the front-to-back movement of the wheel.
A trailing arm is a major suspension link used primarily in rear suspension systems. It connects the wheel hub or axle carrier to the vehicle's unibody or frame, running longitudinally (front-to-back) parallel to the length of the vehicle. Its primary job is to control the fore-aft movement of the rear wheel, keeping the axle aligned during acceleration and braking.
At the frame connection, the trailing arm features a large rubber bushing (trailing arm bushing) that allows the arm to pivot up and down with the suspension while dampening road noise and vibration. In multi-link suspension designs, trailing arms work in combination with control arms and toe links to manage wheel geometry throughout suspension travel.
The most common failure point in trailing arm assemblies is the rubber bushing. Exposed to constant road grime, salt, and pivoting forces, the rubber dry-rots, cracks, or tears. Worn trailing arm bushings allow the rear axle to shift slightly during driving, leading to erratic handling, a loose rear-end feeling, squeaking or clunking sounds over bumps, and rapid rear tire wear.
Replacing trailing arm bushings or the entire trailing arm assembly requires specialized press tools and suspension disassembly. A wheel alignment is always required after rear suspension repairs to ensure proper tracking and handling.