The independent front suspension on all vehicles with adjustable settings to keep the front wheels aligned for optimum handling and minimal tire wear. The ride and handling can be adversely affected vehicles with front suspension out of line, as well as those with uneven tire wear. Before the 1980s, most of the work consisted of suspension alignment check and adjust the front wheels. From 2012 most cars have independent rear suspension that can be adjustable, but most trucks still use a solid rear axle that is not adjustable. Make sure your vehicle is getting the correct alignment and are not paying for services you do not need. Suspension angles
Independent front suspension is based on certain angles and geometry to maintain a compromise between good handling and minimum tire wear. The inclination is the angle of the tires lean when looking at the vehicle from the front or rear. Worn swivel joints can cause the angle of inclination to change, creating excessive wear on the edges of the tires. Camber is the imaginary line drawn through the points of inferior frontal gyrus and governing boards. Camber can also be changed worn ball joints and can affect handling. The toe is the angle at which the tires are pointing forward. Braces worn or bent can cause convergence or divergence excess. All these angles should be measured in an alignment to ensure your vehicle handles quite well with less tire wear.
Front End Alignment
Alignment of the front wheels of the basic front-end services and is usually the least expensive. Only angles of the front wheels is checked and adjusted as necessary. The alignment of the front wheels with the rear wheels of the vehicle are not taken into account in a front-end alignment. For a vehicle with a solid rear axle that has not been in an accident, this type of service may be all that is needed.
Alignment Push
If a vehicle with a solid rear axle has been in an accident, the body of the unitary structure or may have been bent or twisted, causing the rear to keep track of line with the front wheels – sometimes called dog tracking or dog-walking. A simple front-end alignment will not detect this condition. A thrust alignment not only checks the alignment of the front wheels, but also ensures that the front wheels are in line with the rear wheels. A thrust alignment is generally a little more expensive than a front-end alignment.
Four-Wheel Alignment
Four wheel alignments is the way to go if you have a vehicle that has adjustable front and rear suspension. This is usually the most expensive service alignment, and that includes checking and adjusting the front, checking the alignment of the rear push and control and adjustment of the rear wheel suspension.