Join Date: Aug 2009
Own a Commander?: Yes
Model year: 2010
Trim Package: Sport
Power-Train: 5.7L V-8 Hemi
If 4WD - system: QT-II
Current Mileage: 180000
The forum generally agrees (I believe) that the Power Trax will work, but you are right, no one is running it.
I would like to put a powertrax no-slip in one day, but it is not a high priority and with the QTII would only be needed in extreem rare situations (if ever).
You can lift 2 wheels in the air (caddy corner) on these and still push forward with the brake traction control. It applies brake to the wheels in the air so torque goes to the ones on the ground.
The only benefit would be that with the powertrax you would get more torque to the wheels on the ground with slightly (though the stock system reacts quick) less delay.
So for the type of driving you mention you really don't need it, QTII is quite capable, but it wouldn't hurt and as I mentioned, I wouldn't mind having one myself.
It is NOT recommended in the front due to the full time 4wd.