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Home >> Subaru >> 2009 >> Tribeca Base >> Repair and Diagnosis (Single Page) >> Suspension >> Wheel Alignment >> Front Suspension System >> Wheel Alignment >> Inspection >> Thrust Angle
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Thrust Angle

  1. Park the vehicle on a level surface.
  2. Move the vehicle 3 to 4 meters (10 to 13 feet) straight forward.
  3. Draw the center of loci for both the front and rear axles.
  4. Measure distance "L" between the center lines of the axle loci.

    Thrust angle 

    0°±30' 

    Less than 30' when "L" is 24 mm (0.9 in) or less. 

    Fig 1: Measuring Distance "L" Between Center Lines Of Axle Loci
    G06343170Courtesy of SUBARU OF AMERICA, INC.

When adjusting, adjust it to the following value.

Thrust angle 

0°±20' 

Less than 20' when "L" is 16 mm (0.6 in) or less. 

  1. Make thrust angle adjustments by turning the toe-in adjusting bolts of the rear suspension equally in the same direction.
  2. When one rear wheel is adjusted in a toe-in direction, adjust the other rear wheel equally in toe-out direction, in order to make the thrust angle adjustment.
  3. When the left and right adjusting bolts are turned by one graduation, the thrust angle will change approx. 19' ("L" is approx. 16 mm (0.63 in)).
    NOTE: Thrust angle is a mean value of left and right wheel toe angles in relation to the vehicle body center line. Vehicle is driven straight in the thrust angle direction while slanting in the oblique direction depending on the degree of the mean thrust angle.
    Fig 2: Identifying Front, Body Center Line And Thrust Angle
    G06343171Courtesy of SUBARU OF AMERICA, INC.

    Thrust angle: r=(α - β)/2 

    α: Rear RH wheel toe-in angle

    β: Rear LH wheel toe-in angle

    Substitute only the positive toe-in values from each wheel into a and p in the equation.

    Fig 3: Identifying Toe-In Values
    G06343172Courtesy of SUBARU OF AMERICA, INC.