I just brought home my 1949 1 ton cab and chassis truck. I've been browsing through the Tech Tips on this site, and in particular the 1949 manual. I've noticed my truck is slightly different then noted in the manual as my frame is the same length as a 4100 C & C, but is 1/4" thick in lieu of 7/32. I also have the auxiliary springs, which are shown as being available for the 4000 series and higher. I'm wondering if there were differences between the Cdn vs US made models, or did GM consider the published information more as a guide rather then a specification, or did they make special runs if enough customers/farmers requested something? This truck came from Manitoba and may have been made in a Western Canada plant.
I also have a bunch of Gravely two wheel tractors and have found that the factory information is more of a guide rather then a rule. They kind of did what they wanted when they wanted despite what the published literature said. Thx.
