Take that 5000 pounds with a grain of salt. 1st, make sure you have a hitch rated at 750lbs tongue and 7500lbs towing. The Draw Tite on eTrailer is rated that way. I am towing around 4500 with my Diesel and I feel that I am near the limits of the Jeep, even though the same vehicle has a 7500lb tow rating in non-North American markets (Thank you lawyers). In fact, full of passengers, Fuel, Water, etc, I am 100lbs over GVW.
Biggest issue I have towing with the Jeep is Wind Resistance. The diesel, even being more powerful than the V6, can struggle in a good head wind at 60mph. There is a huge difference towing a 5000lb boat and a 5000lb box.