I pull a 31 ft TT ,dry weight is 6200, loaded for a long trip with small amount of fresh water it is right at 8200. I have 7000 plus miles towing that trailer with no problems. I do not tow over 63 MPH and always with the transmission set in 7th. Most of the towing is done in 6th, 5th or lower letting the transmission pick the best gear. One could get away with more but this is what I feel is a load for our 1500 with the GDE tune and doing it safely.