All About Sway Control
(written by Sue Monroe)
You may need a sway control if your vehicle sways while being towed. However, you should first be sure that the load inside is evenly distributed, and there is proper air pressure in the tires. In the event that your trailer sways by large passing vehicles, it is best to steer as little as possible while you slow down, and applying the brake lightly will usually help keep the vehicle aligned.