I have a 4dr 1995 chevy Tahoe. Everything on it is stock. I have the chance to get a nice deal on some 22" rims that I think would look sweet. My problem is a mechanic told me if I didn't want to be back in a year with a broken differential don't put them on. Is this true? Is there something else I need to do to the vehicle? Is he just paranoid? any replies would be appreciated.