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Home >> Mercury >> 2009 >> Mariner Base, 2.5 7, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 108 (Suspension System - General Information) >> Description And Operation >> Wheel Alignment Angles >> Caster

Wheel Alignment Angles: Caster

WARNING: This page is about a different car, the 2009 Mercury Grand Marquis and 2009 Ford Crown Victoria. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Identifying Caster Angles
GF0009636Courtesy of FORD MOTOR CO.
Item Part Number Description
1 - True vertical
2 - Positive caster
3 - Ball joint centerline
4 - Pivot centerline

Caster is the deviation from vertical of an imaginary line drawn through the ball joints when viewed from the side. The caster specifications will give the vehicle the best directional stability characteristics when loaded and driven. The caster setting is not related to tire wear.