Geometry analysis for the kinematic design of the McPherson strut suspension system is presented. Analytical formulations for computing variational constraints of spatial joints are derived. Using this method, a designer may alter design variables and determine the propagated effect throughout the underlying mechanism. The McPherson suspension is represented using graph theory and closed loops are converted to a tree-like structure by cutting joints and introducing new constraints. A change in link length or link orientation is propagated through the model and a new assembled configuration is computed. The analytical formulation and its numerical solution methods are presented. The aim of this work is to provide the user of the experimental computer code with a method for the design and redesign of the McPherson suspension system.

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