1940 had a 2-piece enclosed driveshaft all the way from the rear end to the transmission. I believe they changed to open driveline in 1941 on the larger trucks, IIRC.


1939 GMC AC-102 Long Bed 1/2-Ton
In the Legacy Stovebolt Gallery
More details in his DITY Bay

1940 Chevy WB Series 1.5-Ton
In the Stovebolt Gallery