I'm looking to get a used 2004-2007 Dodge Ram 3500 truck.The specs I've found for 2004-2007 Ram 3500 Quad Cab 4WD LB DRW:3.73 axle ratio = 21,000 (GCWR) 13,350 (max trailer)4.10 axle ratio = 23,000 (GCWR) 15,350 (max trailer)Pretty much all I can fin...