In a previous discussion in this forum, we learned that the U-Haul
axle has one unusual feature: the bolt-on straight tongue runs all the way back to the axle, and bolts to a bracket which is welded to the axle cross-tube
. Since rubber torsion axles assemblies are sensitive to welding heat (too much ruins the rubber), this poses a problem in replacement. This may not be true of all U-Hauls, but is was in that case and is was for the one 13' U-Haul
which I have examined.
Sorry, I don't remember which member did the replacement, and I think the topic was lost last fall
to the hacker, but maybe someone remembers and can supply the final solution.
Regardless of what was done before, I expect that a bolt-on bracket could be fabricated to make a stock replacement axle work, but I would also expect some extra work or expense to do this.