  We explore corrections to electroweak parameters in the context of Extended
Technicolor (ETC) models in which the ETC gauge-boson which generates the
top-quark mass carries weak $SU(2)$ charge. For $m_t \sim 150$ GeV there exist
potentially large corrections to the $Z$ decay width to $b$-quarks.
Interestingly, in contrast to the situation in ETC models where the gauge-boson
which generates the top-quark mass is a weak $SU(2)$ singlet, the corrections
may {\it increase} the $Z \to b \bar{b}$ branching ratio.
