so im doing the 3 quart transmisssion service on the accord and notice some pretty nasty black gunk on the drain plug. When i flushed the transmission a few years back i dont recal any black gunk on the plug. its been maybe 20,000 miles since i did the full flush and the fluid i just dropped was still fairly clean, only a tinge darker than the new pink fluid. Anyone else ever notice this black gunk on a otherwise clean transmission service ? the best way i can describe it is black grease on the magnetic portion of the plug.