Ladder bars are part of the suspension system on a vehicle equipped with coil springs. These components, which prevent the wheels from hopping, are connected to the rear end of the vehicle and at the spring perch. As the car accelerates and begins to get traction, the ladder bars prevent the rear end from jumping up and damaging the chassis and axles. Adjusting your own ladder bars is fairly straightforward, once you know the basic techniques.
When adjusting your car’s ladder bars, ensure that the bars and brackets are square with the rear axle. In addition, make sure that the ladder bars on each side of the rear end are parallel to each other. If the bars and brackets are not square and parallel to each other, the car will not drive straight or it will pull to one side during acceleration.