My current neighbor runs a trucking company. Weekends are normally heavy maintenance as the trucks run Mon - Fri.
I went over to see what all the noise was today and to my delight they are installing a new tag axle - but wait this is a kit for using old steer axles that the king pins haven't gone out of yet and easily found in truck wrecking yards.
The pics tell the story.
One of the trucks
What a Beauty of a grill