I took my Expedition into a local shop to get an alignment and was told that one of my axles was warped. This caused the tire/rim to kind of wobble. The mechanic said that in order for the axle to be like this, I must have hit a curb really bad. However, he said that my rim should have bent because it should have been a nasty hit. This has never happened though. I have a 98 Expy w/ 30k miles. Would this be something that my warranty should cover or is it just normal wear and tear? Thanks in advance.

Robert