First of all you dug this one from the grave its from 2006 !!! second Automatic cars put down a lower number than six speed cars.. When dynoeing a auto car you can ask 2 lock the converter while tuning it and it will show a higher number depending how tight the converter is.. There might be minimal change or more ive seen as much as 20 rear wheel . But in the end a dyno is a tuning device only!! where it really matters is at the track what did it trap , 60' ect.