Mmmmm, the truck was built in late '48 so maybe it was a leftover axle since everything else points to a '49. Where did you get the decode to find out it was a '48? I'd like to take a look at it as well. Also, does it say whether it was a "Detroit Gear and Axle" (that plant had the "A" designation for 49) or "Tonawanda" or someplace else?
And it's going to be a while before I can get the tranny out and cleaned so that part will have to wait.
Good to hear from you as well and that you had an uneventful trip back from KC.