  We consider a heavy fourth family with masses lying in the symmetry breaking
channel of a new strong gauge interaction. This interaction generates a heavy
quark axial-type operator, whose effects can be enhanced through multiple
insertions. In terms of the strength of this operator we can express new
negative contributions to the S and T parameters and the shifts of the Z
couplings to the third family. In particular we find that the new contribution
to T is strongly constrained by the experimental constraints on the Z coupling
to the tau.
