You're going to have to play with the shift points. I have 4.10s and a Vortech blower I have my 1-2 shift set a 4,750 (shifts at 5,900) 2-3 shift at 5,700 3-4 set at 5,300. I have PA valve body so I left the firmness and torque modulation set to stock. You need to play around with the line...