I did just air up the tires, I keep them aired up pretty regularly. You may be on to something about water in the tires. I will be removing the tires within a few days, I'll get back to you gentlemen with what I find. The tires visually appear in good shape, but are simply low on tread life. I thought the front end play, although very small, could be part of the problem. Never really had a problem like this before, it's odd, almost hard to describe.

Cheers,
Mike

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1984 300sd auto with 246,000 miles