Thanks for the responses. Cruiser RV is now saying that the 4370 GAWR on the VIN sticker is a "typo" and they are willing to send me a new sticker with a "corrected label" Is that legal?
Cruiser is avoiding all responsibility because I was out of the one year warranty period (by 6 months). They say there was an issue with the steel Lippert used in the axles, and are putting it back on Lippert.
Meanwhile, Lippert has said they will send me replacement axles at no cost, still rated at 3500 lbs but with 3" beams instead of 2.375" beams like the current ones. They will not cover labor to install them because I do not have photos of the bald tires that I replaced after 3800 miles.
At this point, I would not buy another Cruiser RV product.