  The transresistance (i.e. the voltage induced in one layer by a current in
another) between composite fermions in double-layers of half-filled Landau
levels is shown to be dominated by scattering due to singular gauge field
fluctuations arising from the antisymmetric combination of density fluctuations
in two layers. The drag rate is found to be proportional to $T^{4/3}$ for $T$
less than an energy scale $\Omega_{cr}$ which depends on the spacing, $d$,
between the layers. An observation of a $T^{4/3}$ temperature dependence in the
transresistance would be a strong evidence for the existence of the gauge field
fluctuations.
