I read with interest your assessment on the use of Trans X. I just ordered a filter kit for my 1982 240D automatic. I have faithfully serviced the transmission over my 19 year ownership of the car. I have dealt with an occasional vacuum leak and modulator adjustment. The car has 230K and aside from a slight premature upshift to 4th gear the car runs and shifts fine.
After reading your article on Trans X my temptation is to run a bottle of it for 500 miles prior to changing the fluid and filter to act as a "high detergent" cleaner. My Yankee heritage is telling me if it's not broke don't fix it.
Your thoughts