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In the initial design stages of a vehicle, one desires to analyze and improve the response of the vehicle when sitting at idle or when travelling down various roads. One can perform such analyses and improvements to an FEM model using NASTRAN. However, a faster and easier method has been developed into a postprocessor to NASTRAN called FASTAR. Initially FASTAR was created to supplement NASTRAN by providing interactive graphics modal animation, structural modifications, and sinusoidal frequency response using a reduced modal space. With greater emphasis on vehicle analysis, FASTAR has been modified to process much more complicated loads generated by engines and road profiles. To simplify user input, engine data and road data have been integrated into two comprehensive data bases. As a result, one can now very easily choose in FASTAR specific engines and quickly compute the engine induced vehicle response.