I posted about a month ago trying to track down the cause of this noise http://video.google.com/videoplay?docid=-722875362697214804&hl=en
I noticed since posting that thread that the noise only comes during or in the days following a rain. Once it was dry for a few days, the noise would go away. As soon as it would rain, back it came. I have since done a transmission fluid and filter change, which solved my problem, even when it rained lightly. No metal or anything exciting in the tranny pan, btw. Until today. We have had three or four days of intermittent light to moderate showers, and the noise did not return. Today we had an absolutely torrential rain for about an hour, and I drove the car through some large puddles/creeks on the street, and back came the noise. Now its not nearly as bad as in the video, but there nonetheless. I will soon have a few weeks off from school, and would really like to dig in and figure out what is causing this noise.

Any ideas?

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1985 300D, 237k.
1994 F-350, 6.9 diesel, 5 spd manual, Banks Turbo. 261k.
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