Does anyone know if there is an after market manual transmission that can be swapped for the G56 that comes with the Ram 3500 that would provide the Ram with the 30,000 lbs towing and as much torque as the Aisin automatic?
Have you tried North American Diesel Performance? just google NADP. They have all kinds of set ups from drag trucks to tow monsters to mild street set ups for mileage gains.