A process of conditioning a corrugated diaphragm adapted for use in a traction device in order to impart a spring force. The process includes obtaining a neutral state corrugated diaphragm with a length of predetermined size. The process further includes heating the corrugated diaphragm at a predetermined temperature and time to reduce the overall length of the corrugated diaphragm and increase a minor and major diameter of the conugated diaphragm. The process further includes having the corrugated diaphragm installed on the traction device at a length greater than the reduced overall length and less than the neutral state.