Checking Rear Toe Angle

Fig 1: Checking That Instruments Are Adjusted In Relation To Each Other On Front And Rear Axles

Courtesy of VOLVO CARS OF NORTH AMERICA.

Check that the instruments are adjusted in relation to each other on the front and rear axles. This is extremely important so that the rear wheel toe angle can be adjusted in relation to the car's thrust line (geometric driving axis). The thrust line is the line created when the toe angles for the rear wheels are equally divided. See the figure.

The difference between the symmetry line of the wheels and the thrust line is called the thrust angle. The thrust angle must not deviate by more than a maximum of 0° 0.25° from the symmetry line of the wheels.

Fig 2: Checking Symmetry Line Of Wheels, Thrust Line, And Thrust Angle

Courtesy of VOLVO CARS OF NORTH AMERICA.

Check 

• the symmetry line of the wheels
• the thrust line
• the thrust angle
• Toe angle.

For the correct values for each model, see Wheel Camber, Specifications .