I have a factory manual supplement for 1948 to 1950 printed in Oshawa. I believe it mentions new cab mounts which I presume were the rear mounts. It also gives details of how to repair cracks at the front of the cab and on the radiator. The portion on the radiator shows the installation of the cross bracing rods for the rad support. I think maybe that the early AD trucks had some problems with twisting because of the rear mount design.
