I suppose I should drop the pan and do a service. After posting this question I was flipping through the "Owners Bible" and saw something about noise being made while driving or coasting in reverse. Says it affected trans numbers 3297013 to 3316017. I haven't looked to see what #'s are on mine. Says the problem is defective thrust bearing of K1 clutch. Repair involves removing the trans. Not the answer I was hoping to hear, but not dissimilar with C32's diagnosis.
The bible says I should drop the pan and look for metal shavings. If the clutches are flaked off will I find chunks of material in the pan, or just sludge?
Now I'm wondering if I should just drive the it until the trans fails and replace with a rebuild, or try to fix this one. Either way I gotta pull the trans. I suppose I should see how much garbage is in the pan first.

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Fourings

84 Audi Coupe GT with Turbo engine, EFI (buh-bye CIS), Jamex seats, Koni's/H&R's, e-code lights. 210k and counting.
1992 Anthracite 400E, 161k, "Grey Ghost".
1986 VW Quantum Syncro, 192k, gone to the crusher in the sky.
1989 300TE 172k. (Was mine, now also Mom's car)
72 280SE 4.5 (Mom's car)