Originally Posted by MAJORJDB
Been pulling TTs for 30+ years with a WD hitch and have never seen or heard of that causing cracks. Would be interested in any research info you might have on that effect with AS units. May have to reconsider either the TT or hitch system in my future RV ops.
There are too many AS units for sale to settle for one with possible structural issues. Might be an expensive "good deal"... Good Luck
Cracks in the shell or chassis, are caused by vibration, nothing else.
What causes the vibration ??
Excess rated tow vehicle.
Excess rated hitch bars.
Unbalanced running gear.
Bad rubber rods in the axle/axles.
Anyone or more of the above will cause cracks typically in the front of the shell and near the axles in the chassis.
That has been happening during my 50 years with Airstream.
The KEY QUESTION
when looking at any Airstream that has cracks in the aluminum, is that it also could have them in the chassis.
How do you know ??
Guess work doesn't do it, but eyeball inspection does.
Personally, I would never recommend
to anyone to buy an Airstream that had visible cracks, since there very possibly are other cracks that they did not see or discover.
Then, when those other cracks appear, the costs to correct them can run into thousands of dollars.
But as always, BUYER BEWARE.