A low temperature (176K), high resolution far-IR spectrum of 1,1,1,2-tetrafluoroethane (HFC-134a) has been recorded at the Australian Synchrotron Far-IR beamline. The v(8) band, located at 665.62 cm(-1), has been analysed and 4635 ro-vibrational transitions were assigned and confirmed using ground state combination differences. Local perturbations emanating from two interacting dark states were identified, and subsequently treated using two c-axis Coriolis coupling terms. The necessary modifications of a collisional cooling/enclosive flow cooling cell for synchrotron far-IR spectroscopy are outlined. (C) 2015 Elsevier B.V. All rights reserved.