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On the basis of a mathematic model with 11 degrees of freedom, in this paper are analyzed the dynamic forces at the automobile wheels and the maximum height of the oscillation level that a car looses grip depending on its speed. For processing the experimental data and analyzing the mathematic model, the oscillation levels were approximated with a sinusoidal function. In the end of the paper we present the interpretation of the results obtained on three rock pit tracks, where were recorded notable difference in the values measured on the field and those experimentally determined. The tracks were first measured and then drown in AutoCAD by a similar method like the one used in topometrical measures.