My '48 One Ton Dually had a droopy door handle on the passenger side. It worked fine and had the same range of movement as the good handle on the driver's side but it pointed down to about where 5 o'clock would be on a clock face.
The shaft of the handle assembly is press fit into the handle . I think what happens is that when the door is locked and someone tries to open it from the outside, they end up twisting the handle on the shaft.
I removed the handle assembly, tightened the square end of the shaft carefully into my bench vise and then simply twisted the handle counterclockwise about as much as I thought it needed.
It was tight but it turned on the shaft! One more small adjustment and it was aligned just right. No fuss, no muss. Maybe it will work for you too.
