Minimum payload capacity for the Dodge Ram Mega Cab 1500 4WD is 1,880 pounds with a minimum trailer weight of 7,200 pounds. Maximum payload capacity for a 3500 2WD with the Cummins turbodiesel and automatic transmission is 2,970 pounds with a maximum trailer weight of 15,900 pounds. Towing the family boat or travel trailer, along with up to six occupants and their gear, is no problem for the Dodge Ram Mega Cab 3500.