One thing I could pass on to all you Taco owners that may not know..there is a TSB(tech service bulletin?) that covers beefing up(changing them to heavier) the rear leaf springs to make them not sag as much..most dealers will do it free if the vehicle has less than 50k miles (05 thru 2010) as I recall..didn't change the ride much at all, just feels more like a truck than a car, but they are manly trucks aint they..
I am gussing it will help supporting the hitch weight, but not eliminating the need for a WDH..take care