  We constrain the parameters of dynamical torsion, namely, the torsion-fermion
coupling and the torsion mass, by making a careful analysis of current LEP-2
data at several energies, as well as CDF and D0 data from Run-I of the
Tevatron. We find that measurements of the forward-backward asymmetry in the
e+- e- -> mu+- mu- channel at LEP-2 produce the most restrictive bounds over
most of the parameter space,though other measurements, too, have a significant
role to play. Our results considerably improve the existing constraints on
models with dynamical torsion.
