Anyone with a driveshaft speed sensor care to share some converter slip numbers? I've been out driving the Duster and watching the driveshaft rpm on the data logs. Going down the freeway I get a few percent slip but at WOT the slip increases up to around 10%. I haven't made a full throttle pass down the track yet since the tracks are closed but I've made some part throttle blasts down the freeway and recorded the numbers. While I'm accelerating the slip is up around 10% but it drops as I get out of the throttle and then goes negative as I decelerate.and the driveshaft spins faster than the engine. I'm trying to figure out what gearing I need to put in the car. Obviously I don't want to gear it like a stick car but I'm not sure if I should add the full 10% in or not. Most calculators don't use anything close to 10% for converter slip. I think the old Mopar calculator assumed around 3% slip.