Run a force vector diagram on the traction bar and you will see that under acceleration, the frame end of the traction bar will be pushing up into the the frame. Under braking it will be pulling down. I have my traction bar mounted on the driverside because of the exhaust on the passenger side. Before and after installing showed the amount of twist was a noticeable difference because before, when the axle would wrap, the rear would squat. Now the rear wants to rise because the force of the axle wrapping has been transferred to force pushing up on the frame. With the rotation of the driveline, it now twists the body to the passenger side.