  We write the field equations of torsion gravity theories and the N\oe ther
identity they obey directly in terms of metric and contorsion tensor components
expressed with respect to natural coordinates, i.e. without using vierbien but
Lagrange multipliers. Then we obtain explicit solutions of these equations,
under specific ans\"atze for the contorsion field, by assuming the metric to be
respectively of the Bertotti-Robinson, pp-wave,
Friedmann-Lema\^itre-Robertson-Walker or static spherically symmetric type.
Among these various solutions we obtain some of them have their contorsion
tensor depending on arbitrary functions that didn't influence their geometry.
This raises question about the predictability of the theory.
