Had a problem with a Kodiak 26' several yrs ago, didn't loose a wheel, but had to have new brgs/hub installed @ a campground in Chattanooga, TN. When we got home, the dealer replaced the complete axle. Since then, I check the wheel brg tightness once a yr before we start our jaunt to FL. Have not found our Flagstaff's to be loose. In the process of putting shock absorbers on our new '12 Flagstaff 8528RKWS 5ver and just re-installed the right rear and filled the hub with new grease. 1 down and 3 to go.
Hope your dealer replaced the axle under warranty as if the brgs got that hot, the spindle was compromised and should be replaced.
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