Note that a 27FB Flying Cloud or International have a GVW of 7,600 pounds (average factory empty weight 5,846 pounds between the two trim lines) while the 2014 Classic 27FB has a GVW of 9,000 pounds (factory empty weight of 6,672 pounds). Part of that weight increase is the larger (54 gallon) fresh water tank, 800 pounds of hickory cabinets. larger capacity propane tanks and group 27 versus group 24 batteries.
Thus the gross combination towing weight must also be considered as well as the maximum trailer weight. Many ½ tons are rated for a 7,500 pound trailer or less.
Inquire if your insurance carrier will cover a 7,500 pound trailer rated truck towing a 9,000 pound trailer in the event of an accident. They often look for a way to deny a claim....
From the Dodge build sheets, the standard cab 1500
Ram 5.7 liter gas series are rated for a 9,250 pound trailer with no accessories while the diesel engine models are rated 7,300 pounds. The payload with no accessories drops from a high of 1,635 pounds. Selecting a 4x4 option drops payload by 200 pounds.
While the quad cab models get an increase in trailer weight it comes with a significant decrease in payload capacity before options. A fully loaded 1500
diesel 4x2 Laramie Ltd is rated for a 8,600 pound trailer and has 1,115 pounds of payload while the 4x4 model is rated for a 8,400 pound trailer and only 881 pounds of payload.
There is more to the decision than starting forward motion.