Herman, while this is a crap time of year to tear it down, I would seriously consider taking it apart and checking. A bearing is a lot easier to change before it has failed badly, and the cost of doing it after it fails could be very high. A friend's bearing packed up recently while driving and he stopped as soon as it felt weird (front bearing) but in that short time the entire bearing melted and fused itself to the spindle. He was lucky that it didn't do any really serious damage. The car had been restored only a few hundred kms before. Not quite enough grease it seems.
I hope all is well with you guys.
Mark
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