Sick Cat, yes the filter I've changed is the transmission filter. It's the first time I've seen it externally, but the hoses go to the auto trans/oil cooler in the radiator, and it's also in my Longchamp parts book, so I think they all have it.
But there may be a filter in the trans itself of course. What I'll do is take a good long drive tomorrow, probably the first time this transmission get warmed through in 5-10 years. If that doesn't miraculously fix it, I'll drop the pan and change filter if it's in there. Taking the valvebody apart is probably beyond me, then I need a professional's help.
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