Ok, I have a Nissan Titan 4wd and I'm planning to tow my 23' boat. The weight of my boat and the trailer is around 6400 lbs. Nissan recommends a weight distribution hitch system if the total weight is over 5000lbs. My brother has a spare blue ox towing WDH that I can get. I just want to know if I really need a WD. I'm looking for some advice/tips. Thanks guys!