The low energy vibrational excitation in OCS has been re-examined. The angular dependences of the vibrational cross sections in the 2 resonance region are shown to be proportional to 2 - cos 2 θ for π vibrational modes, and to 1 + 7 cos 2 θ for σ modes. The threshold spectrum (E r e s i d u a l = O eV) reveals that, in the bending series below 0.5 eV, the vibrational modes of σ symmetry are more excited than the π modes. Indeed the vibrational excitation cross sections recorded for a few vibrational modes, show a peak at threshold for the σ modes but not for the π ones. We have also observed a new structure in the S - /OCS dissociative attachment cross section.