No knowledge on this subject, but how can a flushing machine flush out the converter? i thought you had to fire up the engine to get the fluid out of the converter, or as some converters have a drain plug. I hate talking about transmissions, my 1993 duelly with 4L80E with shift kit (tow vehicle) has 197,000 miles and the planaters have been whinning for the last 50,000 miles.
Zip.