  We review the effects of an anomalous chromomagnetic moment on top quark pair
production at the Tevatron for Run II. Apart from an overall rescaling by the
total cross section these couplings have little influence on top production
characteristics. We then examine how the exchange of a Kaluza-Klein tower of
gravitons arising from the low scale quantum gravity scenario of Arkani-Hamed,
Dimopoulos and Dvali influences top pair cross sections and several associated
kinematical distributions. The data that will be available with Run II
luminosities is shown to be sensitive to values of the effective Planck scale
of order 1 TeV or more.
