I should engage my brain before posting next time. If the converter was slipping DS speed would be lower than engine speed. Burnout is probably correct or tire spin somewhere during the run. Ask Al how much the tires moved on the rims by the end of the day.

Might be good to know at what points the data was taken from though since both screen shots show the DS speed higher than engine speed.

Sorry for the misinformation and for getting off track.