[en] We report measurements of the π^-p→π⁰n differential cross sections at six momenta (104-143 MeV/c) and four angles (0 deg. - 40 deg.) by detection of γ-ray pairs from π⁰→γγ decays using a photon-pair spectrometer at TRIUMF. This kinematic region exhibits a vanishing zero-degree cross section from destructive interference between s and p waves, thus yielding special sensitivity to pion-nucleon dynamics. Our data and previous data do not agree, with important implications for earlier claims of large isospin-violating effects