It's a long way from 2015 and you have an axle problem on a 2015 model? Is it a camber issue or toe in/out? You should not have to put up with this, especially if it's a known problem. Axles are a known weak point on TTs and sometimes manufacturers have even been known to use too small a rating compared to the actual weight they carry. Axle tubes are paper thin and can easily be damaged. A spindle can sometimes be bent too.
Lippert likes to say those sorts of things about frames and suspensions and that it's simply the owner's fault. It's partly the RV manufacturer's fault too because they spec out what they want, but Lippert would know if it's too weak and shouldn't really be used. Lots of stories out there about frame and related problems and the RV manufacturer simply flips you over to a 3rd party (Lippert) which you have no direct contractual relationship with.
There's no way a tight turn should damage an axle. Tight turns happen all the time, especially when getting into or out of a CG site. Sometimes the frame/suspension design contributes to axle problems. Lack of I-beam reinforcement, tall spring hangers and under-slung axles (axle on bottom) can aggravate things as there is more movement in the frame and spring hangers which forces the axle tubes to bend. To illustrate what I mean, pic 1 below is a tight turn pulling out of a CG site. Pic 2 is at a frame shop and they pushed on the side of the TT with a forklift. The frame design allowed the spring hangers to bend so much, they forced the axle tube to bend. In a tight turn, the axles are at significantly different turning radii and one axle gets dragged across the road surface.
I highly recommend going to a certified frame & axle shop and pay for a detailed inspection and report. Then send the report c/w pics to the dealer and the factory. You need to find the right person at the factory though. The sooner you do this, the better so they have less reason to blame you.
Also look underneath at your suspension and see if anything doesn't look right. The spring hangers should be perfectly vertical for ex. Check the axle rating, it looks like they should be at least 4,000 lbs each. You might get your tongue weight and gross (actual) TT weight by going to a scale and then you will find out how much weight the axles are actually carrying.
If you go to a frame shop and it turns out nothing is damaged or incorrectly built at the factory, one thing you can do is tie the bottom of the spring hangers together with a cross-member. Mor/Ryde has a kit or you can make your own.
Mor/Ryde X-member This will significantly reduce the axles from bending and in the long run, reduce abnormal tire wear.
If you are going to replace the axles, I would upgrade to at least one size up in axle rating. The only downside to this is that you may have to go from 5 to 6 lug wheels, or 6 to 8 lug depending on what you have now. Don't know if you have Dexter or Al-Ko axles but there is axle info. here. Click on "leaf spring" on upper left and it will take you to axle specs.
Al-Ko axle info. If your axle is bent, I would not want to have it straightened. This should not happen on such a new unit and if it's been bent once already, it can happen again. New axles are relatively cheap.
