Were the brgs burnt or did they just fall apart? If they were burnt, they were too tight and if they fell apart, probably too loose or just bad brgs. Could have been from lack of grease. Not much to go on for answers.
Have been talking to the dealers warranty rep. tomorrow again. He is trying to help. Seams there has been an excessive amount of axle failures the mfg know it and are washing their hands of it. blaming owner maintenance