  Many types of physics beyond the standard model include an extended
electroweak gauge group. If these extensions are associated with flavor
symmetry breaking, the gauge interactions will not be flavor-universal. In this
note we update the bounds placed by electroweak data on the existence of flavor
non-universal extensions to the standard model in the context of topcolor
assisted technicolor (TC2), noncommuting extended technicolor (NCETC), and the
ununified standard model (UUM). In the first two cases the extended gauge
interactions couple to the third generation fermions differently than to the
light fermions, while in the ununified standard model the gauge interactions
couple differently to quarks and leptons. The extra SU(2) triplet of gauge
bosons in NCETC and UUM models must be heavier than about 3 TeV, while the
extra Z boson in TC2 models must be heavier than about 1 TeV.
