Looking through the Master Parts Books, it appears that the axles may or may not be the same from '41-46. There were two different axles, one type was used on '41-46 1 1/2, 2 ton and COE models while another, '41-50' was used on only 1 1/2 ton trucks and shared with '46-52 1 ton models. There should be some big numbers forged into the I-beams that would be of use in ID'ing them.
GMC seemed to use several different front axles even for the same series of truck, offering Clark and Timken? axles as well as the standard GM axles.
Jeff
