Front caster adjustment is not a separate procedure on the Probe. Front caster should fall within specification when the front camber is adjusted. Make sure the tires are correctly and uniformly inflated and any abnormal loads are removed from the vehicle. If the caster is not within specification after the camber is adjusted, and the control arms, stabilizer and bushings are in good condition, check the vehicle body for distortion at suspension mounting points due to collision damage, curb or pothole impacts, improper hoisting, etc. Usually, front wheel drive cars are not sensitive to caster differences from side to side that are less than 1 degree.
Camber is always set before any other adjustments. Camber can cause both pull and tire wear if it is not set correctly.
The top mounting studs on the front struts are offset to allow camber adjustment. Camber adjustment is done by removing the stud nuts, lowering the strut and rotating it to one of three positions. Each of these positions provides a different camber and caster angle combination to facilitate front end alignment.
Toe is the difference in distance between the front edge of the front tires and the rear edge of the front tires (The difference between X and Y in Fig. 27). An incorrect toe setting can affect steering feel and cause excessive tire wear.
The toe setting is adjusted by loosening the locknut on each tie rod end and turning the rod until the toe is within specification. The tie rods must be turned in or out an equal amount on each side to keep the steering wheel centered.