Andy the type of valve body you have does not apply the band in first. The is no engine braking in first....if you were doing say 30 mph when you clicked it into first and took you foot off the gas the engine would drop down to idle. Back when a lot of us were your and foolish that was our secret advantage when street racing. from a roll. It would act like you had a much loser torque converter. At least until you rolled the sprag over. As Cab would say. Don't ask me how I would know