After the larger orders had been made in 1937, both AMX and the Renault design bureau, that had not been nationalised, tried to introduce further modifications to improve the production series. Several of these would indeed be incorporated into the UE 2 production run, but these were of a minor nature; there were however much more fundamental changes proposed, aimed at solving the structural suspension problems, that were the reason Berliet and Fouga still tried to obtain approval of their "chenillette" projects, even after a choice had been made for the Renault UE2: they hoped that eventually the Renault UE would be abandoned altogether. To be able to present immediate alternatives, should the occasion arise, AMX and Renault developed stronger suspension systems.