Re: transmission upshifts to early
To resolve your issue, you need to purchase a Superchips Tuner with the add-on Advanced Transmission Tuning Application. It will allow you to not only modify the engine tune, but also adjust ALL up and down shift schedules as well as wide open throttle upshifts and torque management for all forward gears. On mine, in addition to the tuner and ATT App, I've also added a Sonnax Line Pressure Booster and Transgo Valve Body Shift Kit. My 545RFE now works about as good as possible without doing a complete performance rebuild.
With the aftermarket camshaft that I have in my Hemi, I needed to move all my light throttle shift points to a higher RPM because of the cam's torque/horsepower curve. All of my light throttle upshifts now occur around 2200-2400 RPM or so. My wide open throttle upshifts are set at 6200 RPM and all of my downshifts are set so there is absolutely no lugging of the engine at any point.
05 LX/RT & 06 WK/GCO, modded similarly, MDS "ON" Light, Vortex Gens, Debadged, DashHawk, BT Catch Can, SRT CAI W/Add Air Inlet, K&N Filter, Sonnax Trans Press Booster, SC Tuner W/Adv Trans Tuning App, DS Tuner, Cust tube headers w/3 in. catback, Bilsteins, SRT frt/rear bumpers, Eibach SRT Lwr Sprgs & Sways, FRI Sidewinder Cam Adv 2*, 6.1 valvetrain, SLP 25% UD Pulley, BBK 90mm TB, SOS Coils/.060 plug gaps. 20 in. SRT Reps.