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Torque rods are suspension links that are meant to limit the movement of the axles without limiting suspension articulation. Torque arm suspensions are very common on medium and heavy-duty trucks and trailer. Torque rods can be longitudinal (running forward and aft), or they can be transverse (running side to side). On truck drive axles the torque rods will keep the axle centered in the frame and control the driveline angles by managing the torque that is running through the driveline and the axles. On trailers, the torque arms will keep the axles centered and aligned to prevent dog-tracking and tire wear.