After several successful years of towing with my PSD with a 7.3, I recently purchased a 2006 Dodge 3500 Dually with a Cummins. It has 3.73 gears and automatic transmission with factory tow package. I am towing a 12,000 pound tandem axle 5th-wheel RV.
In my PSD, I had Autometer gauges (EGT...