The production would be much delayed by financial and technical problems, deliveries only starting in 1936. The AMR 35 proved to be an unreliable vehicle. It was one of the fastest tanks of its day, but its very speed overstressed its mechanical parts. In 1937 it was decided not to make any further orders but organisational difficulties slowed final deliveries of some versions until well into 1940; by the time of the Fall of France in June 1940 the ZT 4 order had even not been finished yet.