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Contact force data for user written subroutines

Hello,
 
I am trying to build a subroutine for the contact force calculation in a gearbox model. The reason I am trying to use a subroutine instead of the default contact formulation is to take into account the time varying mesh stiffness of the contact in terms of the load angle between the mating gear teeth.
 
From what I understood throught test models and documentation, the default way that Adams calculates the contacts in a model is to identify them seperately (in different TRACKS) and calculate the forces individually, summing them to estimate the total contact force between two bodies at each step. So in my case, this would mean that if two sets of teeth come into contact, adams calculates the two forces and sums them to estimate the total contact force. This however does not take into account the individual stiffness change, only the change in the contacting areas.
 
Is there a way to extract information regarding the orientation of the contact point without adding markers to each tooth?
 
If I have not understood the way Adams estimates contacts, please do correct me as the rest of this formulation is based on the spaculation of Adams estimating the forces for each track seperately.
 
Thanks,
 
Josef
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