Python 6 dof constraint is not working as expected. help please?

hey guys.

I have been working on a vehicle system using the python 6DOF constraints.
on one of the joints i want it to be able to spin around one axis. but whenever I do this, it allows it to spin (just a bit) on both of the other axis as well.

so do i have to set my physics rate higher?
is this common with the 6DOF?

Any suggestions are welcome!
Thank you

I have a question for you: do you know of any documentation besides the official, very incomplete, python docs for physics constraints? The only thing I know about python 6dof constraints comes from scrolling through the Bueraki scripts. Otherwise, I’m not much help because nowhere (that I’ve found) does anyone say how to make and modify physics constraints using python.

Heres a more in depth look at 6DOF constraints, but this uses 2.49(everything works in 2.63a except for the creation of a constraint)
http://www.tutorialsforblender3d.com/GameModule/ClassKX_PyConstraintBinding_1f.html